Master of the Royal Secret:

The Invisible College #4

by Jeff Wheeler

From Wall Street Journal bestselling author Jeff Wheeler comes the heart-racing conclusion to the Invisible College series. The fate of the world hangs in the balance as two star-crossed lovers fight to beat impossible odds and secure a future together, and for humanity, or risk an all-consuming winter.

A bargain was struck beyond memory, sealed by an immortal covenant that promised either peace or extinction for humanity. The Aesir will uphold this covenant, whatever the outcome, but the Erlking will do everything in his power to ensure their victory. Two people hold the key to defeating him, but only one of them remembers who they are.

Everyone believed that Robinson Hawksley perished when the Aesir attacked the university at Nirshoye. But with memories unlocked, he now remembers the past and must await the final Awakening of the Aesir. When he revives from a magical sleep, he discovers that the Invisible College is in shambles, that those who practice magic are persecuted and put in debtor’s prison when they cannot pay the exorbitant fines leveled against sorcerers.

To end the coming calamity, Robinson must discover where the Erlking’s daughter is currently a Semblance, a doppelganger living among mortals but not knowing her true identity. It will take every creative instinct and an indefatigable purpose for the last sorcerer of the Invisible College to achieve the impossible. To thwart the Erlking himself who has finally come among mortality in a guise of his own.

There can only be one Master of the Royal Secret.

Genres: Fantasy, Audiobook, Magic, Fiction, Romance

348 pages, Kindle Edition

Published September 16, 2025

About the author

Wall Street Journal bestselling author Jeff Wheeler took an early retirement from his career at Intel in 2014 to write full-time. He is a husband, father of five, and a devout member of The Church of Jesus Christ of Latter-day Saints. Jeff lives in the Rocky Mountains.

Learn about Jeff’s many worlds at www.jeff-wheeler.com, or participate in one of his online writing classes through Writer’s Block (www.writersblock.biz).

Reviews

[Pernille A Prolific Page Turner · Rating 4 out of 5]

This book picks up two decades after the revelations at the end of The Alchemy of Fate. The entire premise of this book is different due to the twist in the previous book.



I don't want to spoil too much so this review is vague and not that long. The unanswered questions I had from the previous books were clarified and it changed the perception of the entire Invisible College series. Things are turned on its head, more challenges must be faced and overcome, and the magic is as wonderfully intricate as in always.

I always love how small actions in earlier books come to fruition in the end - small acts of kindness can have long lasting effects, rippling across time. That is definitely one of the things I will take away from this series. Small kindnesses in the present can have big impacts that you or I cannot fathom in the future.



3.75 stars

A big thank you to NetGalley, Jeff Wheeler, and the publisher for the free eArc in exchange for an honest review.

[Korynne · Rating 4 out of 5]

I thoroughly enjoyed this final installment in the Invisible College series. This series is unlike anything I’ve read before. It’s a mix of low fantasy and sci-fi and historical steampunk setting with a dash of romance and a dash of mystery.

I really love the characters. I’m not using their names here because I don’t want to spoil a big part of the third book, but both the male lead and the female lead are excellent. I loved their individual characterization as well as their connection together. I loved their backstories and histories. I am so excited that the author revealed in the author’s note at the end that we have not seen the last of them.

I knew this book was going to have a satisfying ending, but I was still on tenterhooks up until the final chapter as I was waiting to see how the story would pan out. The ending was exactly the kind of conclusion I wanted to see for this series. I’m so glad I decided to pick up the first book on a whim last month because the Invisible College is a series that will stick with me.

[Kortnee - The Closed Door Bookworm · Rating 5 out of 5]

Definitely don't read this review unless you have read the other books spoilers for the previous book are below

Overview:

Language 🤐: Clean

Romance ❤️‍🔥: Kiss only (Not descriptive)

Violence ⚔️: There are some gun fights and recounting of abuse, as well as recounting of a suicide, I didn't feel that anything was overly graphic

⚠️Abuse, Gun Death, Fire⚠️

Tropes/Micro tropes
- 3 POV
- Star Crossed love
- Saving the world from destruction
- Running from the law
- Music Magic
- Hidden Identities
- Ready to sacrifice themselves for one another!

My Thoughts:

My Initial Thoughts:
OH MY GOODNESS THIS SERIES!! 🤩🤩 What an absolute ROLLERCOASTER this was and ah the hint at the ending and the tie ins to Jeff’s other books! AHHHH!! I need to read all of them right this second 😅🤣 I knew some connections but need to read everything to get all the connections better. I just love all of Jeff’s book and the way he weaves his stories together! This series was so wonderful!! The first in this was not my favorite but boy did it just keep getting better and better with each book! I can not wait to read what else Jeff has in store and also get caught up with what I have not yet read! I will be having more of a review to come but man this was a rollercoaster and I just love love this series and these wonderful characters! Jeff just has such a way of making you feel like his characters are your deeply cherished friends so I’m always sad when I finish one of his series!

My Final thoughts:
This series had my heart! Issac being able to reach out to the Fosters again and when they first reconnected my heart was so happy about! Watching Issac fall for Erika again UGH MY HEART! Seriously this series was so so good! I wish I could forget it and read it all again for the first time! I truly hope that this will not be our last time in the world of the Invisible College! I'm going to miss these characters so much! The final scene in this book made me cry! What a wonderful ending to this beautiful story!

Goodness there were truly so many ups and downs in this story to feel Issacs anxiety and oh goodness the scene of the final confrontation that was INTENSE! I loved it goodness I was freaking out through lots of this book not sure how it was going to end and be wrapped up in a way that wouldn't just rip my heart out, which I mean thanks for tearing my heart apart and then putting it back together 😅😭🩷 I love love love this story! It really grew on me so so much! IT was is fun coming into this story and understanding the magic better and what was going on through the revelations of the last book! I seriously just need to go read the whole series again knowing what I know I think it will bring a whole new perspective to this story!

Thanks so much to Jeff, the Punisher and NetGalley for allowing me to read this ARC. All thoughts and opinions are my own!

[Athena (OneReadingNurse) · Rating 4 out of 5]

Maybe it's just me but that ending was a little bit bewildering and I still have a ton of questions? I might have just missed something?

Overall I really liked this series though and as much as I'm not really sure how TF he's going to tie this lore into Kingfountain, I'm here for it 🤷🏻‍♀️

[Ivan Carreto · Rating 4 out of 5]

Such a great ending to the series that just makes you feel warm and happy. The protagonist we able to overcome everything and feel accomplished in their long journey of finding each other!

[Faith Akinmade · Rating 5 out of 5]

This year's favorite

I have loved this story so much. It has been so sweet and happy to see it finally come to an end. Sad its ending but its all well. Thank you Jeff Wheeler!

[Dayna Smith · Rating 4 out of 5]

Jumping straight into Master of the Royal Secret without having read the previous installments of the Invisible College series was a bold move. That said, I’m grateful it provided an ending to the story arc—something I deeply appreciated even amid some inevitable confusion.

The novel thrusts readers into a world in turmoil: sorcerers persecuted, the Invisible College in ruins, and civilization threatened by an all-consuming winter. Robinson Hawksley awakens with his memories restored and faces not only societal collapse but also the task of locating the Erlking’s daughter—a Semblance hidden among mortals—before the Erlking himself descends to confront him. It’s a story brimming with stakes, magic, and the weight of ancient bargains

Visually and thematically, Wheeler builds a richly imagined world marked by betrayal, magic, and prophecy. The tension between cosmic forces—Aesir and Erlking—and the grounded desperation of magic users adds emotional urgency. Even without context from earlier books, the core conflict and its urgency came through powerfully

However, starting here made me feel untethered—key relationships, lore, and character arcs had already developed over earlier volumes. I found myself yearning for backstories and emotional depth that were likely established in those previous books. Without that foundation, this finale felt like a puzzle with several missing pieces.

On the positive side, the story did deliver satisfying resolution in places. A reviewer noted earlier books addressed lingering conflicts "early on," and storylines unfolded with satisfying tension and foreshadowing. Indeed, much was wrapped up neatly, and the narrative brought decently strong closure to the central conflict.
That said, things wrapped up quickly—potentially due to the 100-page structure suggested in some product listings . A longer format might have allowed for deeper emotional resonance or richer explorations of theme and relationships.

Final Thoughts

Master of the Royal Secret offered an impactful, fast-paced conclusion packed with high stakes and magic. The world-building remains evocative, and the themes of memory, identity, and cosmic duty are compelling—and still resonated even without prior series immersion.

Yet as someone jumping in midway, I occasionally felt lost. The story would pack an emotional punch if read after the first three books, but on its own, it’s more compelling for its ideas than its heart.

So, I’d give it three stars—a solid and imaginative conclusion, but one that works best as its intended finale rather than as a standalone. Still, I’m grateful for the resolution and consider it a satisfying enough finale that makes me interested in going back to fill in the gaps.

[Ariane Bilodeau (bibi.reads.writes) · Rating 4 out of 5]

I’m usually not that much into sci-fi or SFF, but this series has a little *something*. Every time I read something from Wheeler, I’m impressed by his sharp and evocative, but also unpretentious, writing style. I know writing a novel takes tons and tons of time and effort, but he makes it feel effortless, and I always feel immersed in his books.

𝐆𝐞𝐧𝐫𝐞: fantasy, historical fiction, sci-fi
𝐕𝐢𝐛𝐞𝐬: steampunk and regency
𝐒𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐞: non-linear with flashbacks, multiple POVs with 3rd person narrative, epigraphs
𝐏𝐚𝐜𝐞: Medium
𝐑𝐨𝐦𝐚𝐧𝐜𝐞: 3❤️
𝐒𝐩𝐢𝐜𝐞: 0.5🌶️
𝐃𝐢𝐯𝐞𝐫𝐬𝐢𝐭𝐲: neurodiversity and disability (deaf)
𝐑𝐞𝐚𝐝 𝐢𝐟 𝐲𝐨𝐮 𝐥𝐢𝐤𝐞: plot twists and cliffhanger endings, “Whodunit” vibes with tons of suspense, unique magical systems, nerdy protagonists.

Note: I received an advance reader copy in exchange for honest feedback.

#4. Master of the Royal Secret. 4.25⭐ rounded down to 4
This was an epic ending to an epic series! I devoured both last installments back-to-back, in about two days each, and I wasn’t disappointed. When I started The Invisible College, I never thought the series would go in *that* direction—wow! While the first two books were pretty similar in terms of tropes and struggles, things all started to change in book three. More particularly, there was a shift in the main characters. Kinda. (iykyk) I understand why the author did this, but I wish he’d done it sooner. Perhaps halfway through? After three books, you’re attached to a set of characters! Developing the characters and establishing a rapport with the readers WHILE building a climax and heading to a conclusion, all in the same book, was very ambitious. I think Wheeler nailed it with the MMC. But the FMC… not so sure. Perhaps it’s because she didn’t seem to be the brightest bulb on the Christmas tree, but I just couldn’t connect. And while the whole story is about love that neither time nor death can defeat, I really had a hard time buying the instalove thing while I was still mourning the previous FMC.

🤍 Faster pace with lots of movement
🤍 Unexpected turn in the main plotline
🤍 New or powered-up characters
🤍 More magic and fantasy elements
🤍 Higher stakes
🤍 Satisfying ending
❌ Rushed conclusion to an epic journey
❌ Stupid decision galore
❌ Ease of solution
❌ Lack of sexual orientation diversity

Tropes to expect: forbidden magic, societal collapse, star-crossed lovers, instalove (kinda), quest to save the human race, “Winter is coming”

Follow me on Instagram: @bibi.reads.writes

[Sue Olp · Rating 5 out of 5]

The first thing I need to tell you about “Master of the Royal Secret” is that I had a hard time putting it down.
I spent a couple of late nights reading the fourth and final book of “The Invisible College” series. This last entry took me on a rollercoaster ride held my attention from the start all the way to the very end.
Full disclosure, I received an early copy of the book in return for writing an honest review.
Even though only 23 years has elapsed by the start of the book, much has changed. Mortals believe they have won the battle against the Aesir. But because of their disenchantment with the Invisible College, use of magic has been severely limited.
Those who employ magic are imprisoned. The Aesir have seemingly disappeared, and a rumor has spread that the Erlking is dead. The only thing entrancing most citizens of Auvinen is popular a play featuring a young actress named Annalise Kauer.
This is the world Isaac Berrow reawakens into, after more than two decades of a self-imposed sleep, just before the predicted war with the Aesir recommences. Isaac escapes the enemies awaiting his return and is able to reconnect with dear friends – now 23 years older – who help him on his way. It’s fun to see how these familiar faces have aged.
Isaac also gains a new ally, Jack, a young rogue sorcerer who plays the violin and helps him along the way, until Jack is turned into an enemy.
Wheeler makes it pretty easy in this last book for readers to deduce the identity of the character that Eirika, the Erlking’s daughter now inhabits. Heat is oppressive to her. And during sleep, she keeps dreaming of events that we, as readers, are familiar with from past books.
Much of her life is directed by a domineering man, Mr. Froman, who isn’t what he seems, either. Isaac pretty quickly finds Eirika, figures out the actual identity of her mentor, and then bends his energies toward awakening Eirika to who she truly is.
I like the twist Wheeler throws into one of Isaac’s attempts to do that. For a moment it makes me think he is writing the book out of order.
Once united, Eirika and Isaac engage in a battle of wits with the Erlking, seeking to marry one last time to finally win freedom and peace for mortals and force the Aesir to leave. And, as with the other books in the series, he sprinkles in moments of romance along the way.
I won’t ruin the ending, but I will say I enjoyed a final reunion, and the little Easter eggs Wheeler dropped into the story, including one that seems to point to possible future connections with his other worlds.
It makes me want to go back to his other series, so I can guess where he may take us readers next.

[Rachel F · Rating 5 out of 5]

4.5 stars rounded up

This book was thrilling but full of heart and thematically beautiful. And what a way to end the series!

In this final book, we swap out Robinson’s and McKenna’s perspectives to now those of Isaac and Annalise. Lies and clandestine adversaries have decimated the Invisible College, leaving the whole world vulnerable to the imminent Aesir attack that leaves all but one caught flat-footed. The Aesir must be defeated or all of humanity will be. Isaac is exhausting every avenue to find the Erlking’s daughter to try to stave off the Aesir a different way, but this time the Erlking himself is determined to thwart their reunion at every turn. Not to mention the glamours, the deceit, the memory erasing, and the ever-increasing number of body snatching semblances.

The stakes rose much higher in this last book and the plot continued at pace to be quite thrilling. There wasn’t much down time. But I appreciate that. Let’s say I was invested.

I don’t want to spoil too much, but this book brings a large historical depth to the background of our main characters this book. I enjoyed how the newly rediscovered layers of themselves added to their personalities, motivations, and decisions. Yet, their kindness and goodness still shone through. That leads me to touch on the themes. Some might say they’re a touch too on the nose. I’d rather say that they are shown well throughout the series and then reiterated in a more packaged way at the end of this book. We find beautiful themes of family, mercy and justice, intelligence, courage, and so much more. It also strikes me as significant and inspiring to see how much a place’s atmosphere can change with the presence of just one man of conviction and courage.

Having finished the book and seeing all of the string ends wrap up so nicely, it’s clear that Wheeler is a plotting author and had these whole plot lines planned out from the beginning. It comes together oh so well. I guess also take that as a warning if you don't like things to wrap up nicely. This series is my first read of Jeff Wheeler and I’m realizing that I didn’t just stumble upon a great series, but a whole set of interconnected books and worlds. We’re not done with these stories yet, and I’m looking forward to diving deep into the Wheeler’s other works.

Thank you to Jeff Wheeler, Oliver Heber Books, and NetGalley for a copy of the book to read and review. All opinions are my own.

[Sandra · Rating 5 out of 5]

Master of the Royal Secret, the finale of Jeff Wheeler’s Invisible College series, confirms once again that Wheeler is a master at crafting immersive steampunk fantasy. Set years after the previous book, the story opens in a world where magical technologies are fading memories and magic itself is forbidden. Against this stark backdrop, the quest to save the world resumes—and the adventure is both tense and rewarding.

As the conclusion to a four-book saga, I strongly recommend starting with The Invisible College, the series opener. Doing so will enrich your understanding of the characters and amplify the story’s impact. That said, Wheeler provides enough context here for new readers to stay oriented. We reunite with Robinson Hawksley and are introduced to Annalise Kauer and Mr. Froman, both of whom quickly prove essential to the fate of the quest. Their personalities are so vividly drawn that they feel like real people.

One of Wheeler’s strengths is his use of contrasts—justice and injustice, honor and betrayal, life and death—that sharpen the stakes and focus of the protagonists’ journey. Even with magic outlawed, fantasy elements remain abundant, including a spirited underground resistance. Wheeler explores enduring themes of hope, perseverance, loyalty, and compassion, but what shines most is his portrayal of steadfast love—love that neither time nor death can defeat.

Scattered throughout are memorable lines that read like mottos for life: “Persistence and diligence author success,” or “Sufficient preparation is more than half the battle. The rest is steadiness of purpose mingled with the power to wait.”* These moments add weight to the action and resonance to the story’s resolution.

Heartrending yet triumphant, Master of the Royal Secret brings the series to a powerful close. With vivid characters, taut dialogue, magical intrigue, and moral depth woven into gripping fantasy adventure, it is a must-read conclusion for fans of the genre.

*I thank NetGalley for sending me an advanced copy of this book for my review consideration. Quotes were taken from the advanced copy, and all opinions in this review are my own. I have purchased this book for my own library.

[Jill E. · Rating 4 out of 5]

I’m a great fan of Jeff Wheeler‘s books and I am delighted every time he releases a new book or a new series.

Wheeler is a gifted writer who is able to create other-worldly creatures and civilizations, while also interweaving elements of the human condition, such as friendship and family, finding what is most important in life, and most centrally, love… and what people will do to preserve love in its many forms.

Wheeler is always very good at setting excellent pacing for the plot. Once I realized that McKenna had been “reborn“ to a new body, the story was off and running.

It is so gratifying that Isaac is so determined to reunite with the erlking‘s daughter—not only to salvage what they have lost 999 times before, but also to save the human race. Wheeler also is so excellent at creating different kinds of magic… I loved the fact that magic was so focused on music, which makes complete sense to me.

It is also interesting to see how some members of the Aesir race viewed humanity so differently than the erlking, who was harsh and inflexible, and essentially uncaring about the cost of human life.

A great deal has changed between book three and book four in terms of society’s view of sorcerers. The juxtaposition between book three where all kinds of magic is possible, and book four where all magic is prohibited, provides for challenges that Isaac has not seen since he was first taught sorcery’s secrets by the erlking‘s daughter hundreds of years before.

In the end, the struggle between fulfilling the quest to realize their years-long love or saving humanity, keeps the reader captivated to discover what choice these two people will make.

I very much enjoyed that the author ended the book with a Shakespearean sonnet; and Wheeler’s Afterword hints at a connection in the future to another series.

It is always such a pleasure to see where Wheeler will take us in his next book/series. I enjoyed this series and I’m so pleased that the suspense is finally over—and to find closure and have all of my questions answered.

Well-done, Mr. Wheeler.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.

[Elizabeth · Rating 5 out of 5]

Jeff Wheeler’s The Invisible College series continues to captivate readers in Book 4, Master of The Royal Secret, with its rich world-building, intense political intrigue, and gripping character development. World-building remains one of the novel’s greatest strengths—Wheeler has a knack for creating detailed, vivid settings that feel tangible and rich with history. The cities, landscapes, and magical systems are all beautifully imagined, and there’s a distinct sense of place that enveloped me in the story.

Yet the journey of the characters is the heart of the book. With not one, but two compelling protagonists—brave, determined, and brilliant. As with all of Wheeler’s heroes, I really appreciated they were characters I could admire for their integrity – a trait that is often missing in the ‘morally complex’ characters that have become popular in recent years. Instead, the moral complexity was put into the antagonists of the story, allowing for an exploration of themes including abuse, justice and sacrifice.

As a 4th book it brilliantly completes the series, however I’d recommend reading the first three books first. But in case you’d like to jump in right here, I’ll try to avoid spoilers. McKenna and Robinson are back with something of a … make over. The world we knew has been turned on it’s head and old relationships need rekindling. But that was part of what I loved about this book. Rediscovering a world I thought I knew and experiencing a wonderful romance all over again.

I also enjoyed the way Wheeler answered so many questions and tied up several plot threads at the end of book 3, The Alchemy of Fate, while also managing to leave it on an intriguing cliff hanger. Master of the Royal Secret is original and satisfying in its approach to answering all my questions and delivering a punchy climax, making it a perfect conclusion to the Invisible College series. Jeff Wheeler has once again proven himself a master of blending magic, politics, and romance into an unforgettable tale.

[David Barrus · Rating 5 out of 5]

Jeff Wheeler brings his series to a close with "Master of the Royal Secret," and what a finale it is. Set two decades after the explosive revelations of book three, this fourth installment takes everything we've learned and propels it toward a high-stakes conclusion that left me completely satisfied.

One of the things I appreciated most about this book is how straightforward it is compared to the mystery-laden earlier volumes. With most of the hidden elements finally revealed in book three, Wheeler can focus on what really matters: the clear and present danger facing humanity, and the incredibly high stakes that come with it. There's no ambiguity here—you know exactly what the conflict is and why it matters so desperately.

What truly sets this book apart is how Wheeler uses the revelations from book three to create an incredibly tense and urgent quest. Knowing the true scope and ancient nature of Robinson and McKenna's connection—and what it means for the fate of humanity—transforms this final book into a desperate race against time. The nature of their bond, revealed in the previous book, makes every moment Robinson spends searching for his love feel monumentally important. The stakes couldn't be higher: if he fails to find her, humanity itself will be destroyed.

The resolution hinges on something that feels both inevitable and surprising—a culmination that's been building not just through four books, but across eons. Wheeler masterfully shows how sometimes the most powerful magic isn't in grand gestures but in persistent love and commitment.

As a longtime fan of Jeff Wheeler's work, I was thrilled to see how this book ties into his broader body of work. The connections are subtle but rewarding for dedicated readers.

For fans of the series, this is the conclusion you've been hoping for—one that takes the revelations from book three and delivers an ending that feels both earned and satisfying.

[Rachel · Rating 5 out of 5]

I received an early advance copy of this book for an honest review.

Master of the Royal Secret was a perfect conclusion to the Invisible college series. I felt as if this was the book I had been waiting to read this whole series!

The past three books perfectly set up this one. Isaac Berrow, now woken up from his 23 year Skymir sleep, has to find Eirika and make her fall in love with him for the 1000 time. However this time the Erlking has taken the form of a Semblance and is determined to prevent them from finding each other again. If they manage to find each other and get married for the 1000th and last time, they will put an end to the centuries long war between humankind and the Aesir.

The set up for this book was so exciting. I loved the alternating perspectives from Isaac and Annalise and the dramatic irony that came from Isaac understanding everything that was going on while Annalise was completely oblivious.

I will admit, it was a little jarring to go from Rob and McKenna to Isaac and Annalise. However, the premise was set up well and I was able to quickly fall in love with Annalise the way I fell in love with McKenna. Her character was just so interesting, she was hard to resist.

Although the two main characters, Isaac and Annalise, were somewhat new characters I was so happy to see that the Fosters and Wickins were still involved.

If I have any complaints about this book it is simply that it was too short! I wish I could have read more about Annalise and her life as an actress. I love how her and Isaac’s relationship developed but I wish I could have read more of them falling in love again. I also would have loved to see more of the other characters.

Ultimately this book is full of action, suspense, magic, and good clean romance. It was a thrilling and satisfying conclusion to the series and I really enjoyed it.

[Sandra · Rating 5 out of 5]

A Spellbinding Conclusion to an Epic Journey
Jeff Wheeler’s Master of the Royal Secret is a masterful and fitting conclusion to the captivating Invisible College series. This book plunges back into the high-stakes world of magic, prophecy, and political intrigue, tying up the many threads laid out in the previous installments with an expert hand. It’s a rewarding read for anyone who has been invested in the journey of Robinson and McKenna.
The pacing in this final book is absolutely relentless, a huge plus for fans who crave action and revelations. The story wastes no time picking up from the cliffhanger of the previous book, launching the characters into a whirlwind of betrayals, difficult choices, and unexpected alliances. Wheeler adds new layers to the world-building, exploring fresh angles on the magic system and the ancient lore that underpins the series.
One of the book’s greatest strengths is its focus on the central romance between Robinson and McKenna. Their love story has been a cornerstone of the series, and here, it reaches its epic and satisfying climax. The author beautifully portrays a love that has endured across lifetimes, making the final push to unravel fate and secure their future all the more compelling.
For fans of Jeff Wheeler’s work, Master of the Royal Secret is everything you've been waiting for and more. It's a complex, beautifully crafted finale that will leave you with a sense of wonder and a deep appreciation for the journey these characters have taken. This book solidifies Wheeler's place as a master of character-driven fantasy, delivering a conclusion that is both emotionally resonant and utterly unforgettable.
Thanks to Netgalley for the ARC's

[Lea · Rating 5 out of 5]

Author Jeff Wheeler wraps up the 4th and final installment of The Invisible College with a magical Steampunk bow in Master of the Royal Secret. We’ve learned much about the fantastical world of Auvinen where a coexisting pact between an otherworldly race and a Victorian society was formed. Now that “agreement “ has been breached and after a millennium the two societies are hurdling toward the conclusion of a race to prevent the annihilation of humanity.

Only Two star crossed lovers lost and found through 999 lifetimes can bring about the peace that will save both races by completing a task they accepted long ago. There is only one lifetime left to complete their promises to the ErlKing and to each other to save both races. Will they succeed?

Jeff Wheeler excels in weaving the plots and twists of living in the fantastical worlds he builds. He has built a magical system and terminology from whole cloth. The main characters are endearing, complex and likeable. The story is well paced ranging from intimate, tender moments to situations fraught with danger with magic sprinkled throughout. We are pushed and pulled through the past and present of Robinson and Aurora’s thousand lifetimes without the key to the mysteries of how the ErlKing bestowed magic and ushered the humans into a Steampunk society and why it mysteriously all fell apart and devolved into a war of survival.

The inevitable ending is very artfully written and all the dangling strings and unanswered questions are resolved in a very tense and brilliant denouement.

I can truly say I found it difficult to put this series down, and I no doubt will revisit this rich storytelling a second time.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.

[Michael Knight · Rating 5 out of 5]

Jeff Wheeler has once again created an intriguing and detailed world for the series which began with The Invisible College. Fortunately for readers, the third and fourth books in the series are released on the same day. While The Alchemy of Fate (3rd book) continues the story of Robinson and Mckenna, ending with a surprising cliffhanger, Master of the Royal Secret continues the story 23 years into the future. The Aesir, an advanced race who are out to destroy humanity, have infiltrated the human government and outlawed both the Invisible College as well as sorcery in general. If the star-crossed lovers can find one another just one more time, they can end the Aesir threat once and for all. However, the Erlking will do everything in his power to prevent this as the Aesir are just about to achieve their victory. Wheeler not only masterfully develops a world that has changed from magical power to steam power, but creates characters that draw in the reader and allow them to feel the joys and pains along the way. I was drawn into the series after reading the first few pages of The Invisible College and as I approached the latter part of Master of the Royal Secret, could not put down the book for many chapters until I had finished the last page. I have enjoyed all of Wheeler's novels and this series is my favorite so far with Master of the Royal Secret his best conclusion to a series yet. I highly recommend this entire series and especially this final book in that series.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.

[K · Rating 5 out of 5]

This book brought it all together.

This series has been really fascinating. The mild steampunk world, both so familiar and so distant. The characters who are just so close to being familiar. Like, I know something about Isaac Berrows, don't I? Oh wait, no, that's someone else. It's just tickling at my brain and it's so fun. That world is tilted on its head for this book.

This is my favorite of the Invisible College series. The starlet and the professor. The old Cary Grant & Marilyn Monroe movie, Monkey Business, comes to mind, but it's got so much more depth. The professor, Cary Grant, is terribly clever and so in love with our Marilyn Monroe starlet. The evil Aesir king is such a good example of a stern, exacting father who thinks that his faiths is just some dumb kid, even after a thousand lifetimes. Actually, the Aesir King was the only character that I took issue with and it was only at the end. I find myself needing more context regarding choices made at the end. Yes, I'm being vague because I'm trying not to give away the story but there's a change in the King that doesn't sit quite right. Maybe it's just cultural for the Aesir to be reluctantly gracious at the end? Maybe there's more with their side of the story to come and that's the piece that I'm missing?

Mr. Wheeler's books are always clean off sex and bad words. Violence is a little more present in this book than in the previous series. All told, it's a fantastic series that leaves me wanting to know more, and really, what more can you all for from a good book?

[Miko Knight · Rating 4 out of 5]

Master of the Royal Secret, the final book in Jeff Wheeler's Invisible College series, wraps up a steampunk fantasy storyline that captivated me from the beginning. I don't go in for spoilers, but I'll share several things we learn several within the first few chapters.

Right off, we're plunged into the not-too-distant future from the conclusion of book #3 (The Alchemy of Fate); though it's only been a couple decades, society has undergone a massive shift: the Invisible College has been dissolved, magic—and, consequently, music—outlawed as Semblances infiltrate the government at the highest levels.

Our protagonists have also irrevocably changed; following the twist at the end of TAoF, Robinson regained memories of his past lives and reverted to his original incarnation as Isaac Berrow, founder of the Invisible College, though his core personality remains intact. Similarly, the Erlking's daughter Eríka, a Semblance formerly in the guise of McKenna, now inhabits a new person. Unlike Isaac, Eríka is completely immersed in her new persona, with no concept of her true nature.

This sets the stage for a thrilling conclusion to our MCs journey toward finding each other and setting things right. In the end, I was left feeling satisfied. Wheeler wrapped everything up nicely, leaving me with a sense of hope and content. As usual, I recommend this series—along with basically all Wheeler's books—to anyone who likes fantastical tales with excellent character arcs and a happy ending!

[Viking Jam · Rating 2 out of 5]

Review: This world is drawn within the lines of steampunk and pure magical fantasy. It wars with itself in strange ways. Maybe it is contradictory within me noggin' yet I will attempt to explain.

You are a wizard / sage etc. with immense powers. i.e. you can sleep for centuries without aging, change your appearance, go invisible, repel bullets, heal from any injury etc. You are essentially immortal. Yet you run from every encounter like your life is on the line, only to use the barest amounts of magic to see you through to another day. You pine around hoping to bone your lost wife from a previous life whom, I might add, is hotter than a dry popcorn fart. Where is the pull on this story line? Everyone is super speshul or super evilly. The main characters were not built in any inventive way. The movement is the only part of this novel that captures the imagination.

There is this cloying cultural representation that pervades this novel. It is set in the olde English industrial revolution that strains at the renaissance leash. Everyone cares so, so much and holds propriety in high regard. Even the scoundrels have an air of refined reticience and bleed Moriarity with icey glares. There are chapters of super twit running through her lines as an actress extroidonaire. How this is relevant, you got me.

I missed the intial start of this series and good thing.

I received this ARC for an honest review.

2.4/5

[Jesica · Rating 5 out of 5]

"It was mercy that started this war," Jack said. "And it is justice that has ended it.”

Wow just wow 😳 This conclusion was everything I wanted and more. It’s been awhile since a book or a series had me staying up late to finish. I mean I could not sleep until the last page was turned. I was so invested in these characters & the amount of anxiety I had reading this final installment had me sitting on the edge of my seat freaking out! Book three left us with some shocking reveals that changed everything & I was so glad that book 4 is releasing on the same day as book 3 plus Im so glad I had a chance to read both of them before the release date! This series started out as a steampunk fantasy with some dark academia & a unique musical magic system but book 3 & 4 everything changed & became so much more… think epic romance 😍 So many twists & turns that will keep you turning the pages. It’s full of secrets, intrigue, magic & a war between the immortal Aesir & man. I don’t want to say too much about this one because it’ll ruin the experience just know it’s fantastic and the ending was so satisfying! If you haven’t started this series yet just read it and you can thank me later 😉

"She was every woman he had ever loved. "That I've loved you for ten thousand years. I'm not sure it has actually been that long. But it feels like that at the moment. And I will love you for ten thousand more."

[Annabelle · Rating 4 out of 5]

If I were to hazard a guess as to where the series was going after I first read The Invisible College, there is no way that I could have predicted any of this book. It is not that the series had any sharp twists or sudden turns but it subtly builds a story that evolved from a magical school or secret society to a fantastical love story. This is no romantasy and not even a traditionally styled fantasy with a romance sub-plot. It actually took me a while to try to figure out what it reminded me of, and the best I could come up with is a time-travel movie where lost loves search through time for each other (there isn't actually time travel in this story, but it was my best comparison) and the author's afterword explaining his inspiration made me think that I was not too far off. The plot was well-thought out, the magic was interesting, the world and characters were engaging and the last book concluded a good series in a satisfying way. I had not read any of this authors work outside of this series but having enjoyed it, and the hint of a tie-in in the afterword, makes me consider reading more from Jeff Wheeler.
I received access to this eARC thru NetGalley (for which I want to thank NetGalley and the publisher, Oliver Heber Books) for an honest review. The opinion expressed here is my own.

[Rachel · Rating 5 out of 5]

⚠️ Spoilers for the first three books ahead! ⚠️

An epic, emotional, and satisfying finale—my favorite book in the series!

The Invisible College series comes to an end with a bang, and what an incredible ride it was. This fourth book was everything I hoped for and more. I loved every second of it—fast-paced, exciting, and impossible to put down.

The stakes have never been higher: the government has been overrun with semblances, their power has grown out of control, and the Erlking is pulling the strings. Amidst it all, we meet Annalise Kaur, an important new character who plays a pivotal role—I really enjoyed how much depth she added to the story.

Meanwhile, Erika and Isaac finally find each other and fall in love. But will they achieve the final marriage, or is the human race destined to be lost forever? The tension kept me guessing until the very end.

Overall, this was such a satisfying conclusion—thrilling, heartfelt, and memorable. I’m sad to say goodbye to this world, but so grateful for the journey.

So, to recap...

Pros:
✔ Epic finale
✔ Fast-paced & exciting
✔ New character (Annalise!)
✔ Erika + Isaac ❤️
✔ Satisfying ending

Cons:
✘ The series is over 😭

Thank you to NetGalley and the publisher for early access to this book. And of course, thank you, Jeff Wheeler, for another fabulous read!

[WhereSweetThingsGrow · Rating 5 out of 5]

I really enjoyed the entirety of the Invisible College series by Jeff Wheeler, and the concluding book, The Master of the Royal Secret, is no exception.
The resolution of the story kept me riveted to my Kindle from beginning to end. I love the historical and legend based main characters that Mr. Wheeler brings to life, adapting them to his own world. He manages to fit in two great sets of historical characters this time. His secondary and ancillary characters are just as fun and memorable.
No spoilers, but watch for a dog in this series!
The plot is fast-paced and fun. The settings are beautiful. There's plenty of adventure.
One of my favorite things to find in Jeff Wheeler books are the threads that ever so subtly tether each of his worlds together. The off-handed remarks and tiny suggestions about how magic systems and other worlds are connected were a delight to discover in The Master of the Royal Secret.
Fortunately, Mr. Wheeler doesn't leave us wondering about his little clues for long. There's a great discussion in the concluding remarks telling us exactly where he's taking us next and how those worlds are related so that we can be excited for the next book!
The Master of the Roysl Secret meets all my expectations and is a super satisfying end to one of my favorite Jeff Wheeler series. Give it a try!

[Jared Hansen · Rating 4 out of 5]

This book takes a bit of a departure from the previous three books in the series. The previous books were more action packed, this one is more about the relationship between the two main characters and if they will be able to resolve the conflict set up in the previous book. The book sets out to be more of a romance rather than an adventure, while there are aspects of adventure and serious danger, it still spends more time on the main characters’ relationship than action.
While the more personal focus of the story is fun, I tend to gravitate towards more action heavy stories. For my preferred style I would have liked to see more action and danger for our characters. More chances for them to fail because of the forces arrayed against them. Even knowing that it was going to be a happy ending, I wanted to see more consequences for those around the characters and how the forbidden love story impacts others.
Overall, I enjoyed the story and cheered for the protagonists to fall in love. It was fun to see their relationship grow and for them to remember how they had fallen in love a thousand times. This love story lasted for a thousand years, who can say their relationship has lasted that long? I just would have liked to have seen more action and magic.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.

[Teresa · Rating 4 out of 5]

This journey starts 23 years after the death of McKenna, and the awakening of Robinson from Skrýmir. He decides to use his real name, Isaac, instead of Robinson, and start searching for Eiríka. The problem he confronts is that it is illegal to use magic. He tries many times unsuccessful, and can't call Loyal, the dog spirit.
Once Isaac figures his way around, he realizes that he is being hunted by Kellin, who uses devices to detect magic. All the sorcerers were arrested and placed in the underground, which makes it difficult to reach them.
The other things that are different, are that a human body could have more than one Semblace inside. With the help of the friends he had as Robinson, and Loyal finally appearing, he finds Eiríka as Annalise, an actress. This will be their last reunion to defeat her father, who does everything possible to win, and get rid of all humans. Mr. Froman, her father, keeps her isolated to avoid contact with Isaac. There's a lot of manipulation with or without magic.
There's a moment where I cried, to later be, what's going on. The end has a different perspective than I thought.

I received a free copy of this book via Booksprout and am voluntarily leaving a review.

[Maria · Rating 5 out of 5]

Spoilers ahead!!!

The fourth and final book of the Invisible College. Isaac awakes from his deep sleep 23 years after the last Aesir attack and must find Eiríka one final time. This time though, all of his memories are intact from his time as Isaac Berrow, and he knows what’s at stake. The world has shunned magic while he’s been sleeping and persecutes all sorcerers. Isaac reunites with the Foster family, as well as the child he saved from the rubble all those years ago. When a rogue sorcerer with a violin case was being hunted, I KNEW it was Jack! I’m always a little sad when a series ends and I have to say goodbye to characters I’ve grown attached to, but after all their suffering through a thousand lifetimes, I was happy to see Isaac and Eiríka get their happy ending. I also loved the last re-appearance of McKenna and her heartwarming reunion with the Foster family. Side note, I always enjoy the nods to other worlds… mentions of golden tomes and abbeys that teach secrets?! Also the mention of “unwearying one” makes me think of our dear friend, Maderos/Myrddin. Maybe the Aesir will pop up in another world we already know in Jeff’s multiverse!

[Marci Jackson · Rating 5 out of 5]

The fourth and final book in the Invisible College was everything I had hoped for! Wheeler’s unique interpretation of reincarnation is fully explained, and all is made clear for the actual identities of Rob and McKenna. I am confident we have not seen the last of Rob and McKenna, and there are hints that we will see them and/or the Aesir in another of Wheeler’s worlds! As always, Jeff delivers: a fully detailed and realized world, his interesting musical magic system unique to the Aesir and the Invisible College, and non-stop action and intrigue, while weaving a love story for the ages. I want to avoid spoilers but I also want to give other readers some sense of how deep and complex the final resolution of this plot is, while leaving open the possibility of connections to Wheeler’s other worlds/series. For those who are hesitant, there IS a deeply satisfying ending (finding each other through 1,000 lives), and finishing the book with a Shakespeare sonnet on love was brilliant. Be sure you read this as soon as you can! You will love it as much as his other series. Wheeler ALWAYS delivers!

[Emma K · Rating 5 out of 5]

This is a brilliant conclusion to a brilliant series.

The ending is truly epic, a fitting conclusion to a centuries long war against the Aesir. Like the previous books in the series, there is less fighting and more outsmarting adversaries. Very satisfying.

I really like that this whole series is a story about love and commitment, about doing the right thing, not just once but again and again, despite all the griefs and hardships that the characters experience.

I had worried that the large time gap between this book and the previous one would cause the tone to change, but it didn’t. The world is very different but the main characters and their goal are the same.

Each book has a different 3rd POV character. I like that they give the world more depth, allowing us to learn things that we couldn’t learn from the main characters. In this book it is a man called Kellin Carrault who gives a good sense of how the world has changed in the last 23 years.

In this series there are hints at links to other series, though this series can be read by itself.