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Remnants of the Fallen Kingdom #3

A Devious Brother: Remnants of the Fallen Kingdom, Book 3

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Ancient evil has awakened, and blood calls to blood.

When the Witch King awakes from three centuries of slumber, Astra must find a way to prevent him from escaping his magical prison. Joined by an ally as mysterious as untrustworthy, she has to navigate treachery and old oaths for a chance to save the world as she knows—and the prince she loves.

Surrounded by enemies and with his magic tracked, Marlak learns that the key to save his wife and friends is the element he swore never to use again. To wield it, he’ll have to overcome the horrifying echoes of his past.

Meanwhile, the Witch King’s reach grows hourly.

Astra and Marlak will need the support of an unlikely group of heirs and outcasts including former enemies and begrudging allies. If they hope to stand a chance against the Witch King’s thrall, they’ll have set their pride aside and overcome old wounds.

Whatever they do, they must act fast, as their days are numbered and their doom is closer than they think.

With heart-pounding romance, thrilling magic, and a complicated found family, A Devious Brother is the epic finale of the enemies-to-lovers fae romantasy series Remnants of the Fallen Kingdom.

Action-packed, emotional, and romantic, this conclusion is perfect for readers who want not only danger and spice, but also all the warm fuzzies of a wholesome happy ending.

Audible Audio

Published March 11, 2026

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About the author

Day Leitao

21 books2,010 followers
🪄 Magic, 💜 heart, 🗡️ action, and 😆 banter!

Find my socials at dayleitao.carrd.co/

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Day Leitao believes in the power of stories, the power of characters, and she writes books with heroes (of both genders) finding their own magic and opening their hearts. Of course, there's also the banter and all the shenanigans that happen when personalities collide. 😂

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5 stars
101 (33%)
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108 (35%)
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80 (26%)
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10 (3%)
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Displaying 1 - 30 of 71 reviews
Profile Image for Andra.
1,095 reviews15 followers
December 25, 2025
Book 3 in Remnants of the Fallen Kingdom series

It's always hard to say goodbye to characters, and this book is no exception. I've been taken on an emotional journey in this true enemies to lovers romance that is centered around political turmoil, impossible decisions, family relationships, friendship, banter, devotion, sacrifice, and love. Astra and Marlak face their biggest hurdles, but they aren't alone in the journey. I loved having all the POVs in this book; it was easy to switch from one to another with an overall smooth flow throughout.

The continuing storyline kept me engaged from the beginning. Detailed world building to draw the reader into the book. Strong, well-developed characters who grow and face one struggle after another.
Profile Image for Danielle Valdez.
178 reviews21 followers
March 10, 2026
Book 3, the final book in the series. I did an ALC copy. narration was fine. it was good.

This book was multiple POVS, but it seemed like the chapters were short. I did listen at 1.7x speed so maybe that's why?

The finale was wrapped up well. We found out more about Astra's magic and and some relationships blossomed. It had a lot happening in may different perspectives which was really nice. I always like getting into the characters head. Lots of twists and turns and evil was certainly evil, but good always defeats evil.

I really enjoyed this series and am thankful to Day for the ARCs and ALC copies as it's been a fun series.
Profile Image for Isa Newbury | reading_isa.
637 reviews9 followers
January 23, 2026
**Thank you to the Author for the ARC; all opinions are my own.**

3.5-3.75 ⭐️
2 🌶

Let me preface that I LOVED the first 2 books in this trilogy, but unfortunately, this one just didn't do it for me. I wanted to know how it ended, so I stuck with it. However, it was very chaotic- a lot was going on, I felt the dialogue was pretty disjointed or repetitive, and I wish we had had more time getting to KNOW the characters rather than...showing...I guess?

I do like HEAs, and am glad the main characters got to experience it. At the end, though, I was left with some lingering disappointment.

☆romantasy trilogy
☆a little spice
☆HEA
☆multiple POVs
☆fae
31 reviews4 followers
March 22, 2026
✨ Fae/elemental magic
✨ Rich fantasy world
✨ A lot of Banter
✨ Politics and romance
✨ Soul mate bond
✨ Powerfull HeroineS
✨ More redemption arc
✨ Found family
✨ End of the story

Magie des Fée/éléments ✨
Monde fantastique riche ✨
Beaucoup de railleries ✨
Politique et romance ✨
Lien d'âmes sœurs ✨
HéroïneS puissanteS ✨
Plus d'arc de rédemption ✨
Famille de cœur ✨
Dénouement de l'histoire ✨

"Ancient evil has awakened, and blood calls to blood.
When the Witch King awakes from three centuries of slumber, Astra must find a way to prevent him from escaping his magical prison. Joined by an ally as mysterious as untrustworthy, she has to navigate treachery and old oaths for a chance to save the world as she knows—and the prince she loves.
Surrounded by enemies and with his magic tracked, Marlak learns that the key to save his wife and friends is the element he swore never to use again. To wield it, he’ll have to overcome the horrifying echoes of his past.
Meanwhile, the Witch King’s reach grows hourly.
Astra and Marlak will need the support of an unlikely group of heirs and outcasts including former enemies and begrudging allies. If they hope to stand a chance against the Witch King’s thrall, they’ll have set their pride aside and overcome old wounds.
Whatever they do, they must act fast, as their days are numbered and their doom is closer than they think.
With heart-pounding romance, thrilling magic, and a complicated found family, A Devious Brother is the epic finale of the enemies-to-lovers fae romantasy series Remnants of the Fallen Kingdom.
Action-packed, emotional, and romantic, this conclusion is perfect for readers who want not only danger and spice, but also all the warm fuzzies of a wholesome happy ending."

I listened to "A Devious Brother" by Day Leitao, narrated once again by Caitlin Kelly and a new narrator, Eden Gabay. This time, the male narrator completely won me over. I was pleasantly surprised by this change; this new voice perfectly serves the plot and the personalities of the different characters.
While Astra and Marlak's absence was felt at the beginning of book 2, here, each of them is fully present. Their soulmate bond is severely tested, and they will have to do everything they can to find each other again. I really enjoyed their story.
Lidiane and Azur strengthen their bond and finally stop fighting their soulmate connection (what a relief!), and confront their respective pasts. Tarla and Renel will have to use their non-magical talents to defeat evil and overcome their differences.
Until the epilogue, I was convinced that Ziven and Mirella would get their own story, but no. Their story lacks development, which is why I can't give the series finale five stars. However, I did notice that all the narrative threads were tied up, and we finally understand the series title: "Remnants of the Fallen Kingdom." And surprise! Several characters could share this title.
Perhaps we'll get a spin-off focused on their children and a journey to the Nowhere Lands… Does Astra still have any family? Who knows…
4.5 ✨!


"Un mal ancestral s'est réveillé, et le sang appelle le sang.
Lorsque le Roi-Sorcier s'éveille après trois siècles de sommeil, Astra doit trouver un moyen de l'empêcher de s'échapper de sa prison magique. Rejointe par un allié aussi mystérieux que perfide, elle doit déjouer les trahisons et les serments ancestraux pour tenter de sauver le monde tel qu'elle le connaît – et le prince qu'elle aime.
Entouré d'ennemis et sa magie traquée, Marlak découvre que la clé pour sauver sa femme et ses amis réside dans l'élément qu'il avait juré de ne plus jamais utiliser. Pour le maîtriser, il devra surmonter les terribles échos de son passé.
Pendant ce temps, l'emprise du Roi-Sorcier s'étend d'heure en heure.
Astra et Marlak auront besoin du soutien d'un groupe improbable d'héritiers et de parias, parmi lesquels d'anciens ennemis et des alliés malgré eux. S'ils veulent avoir une chance de vaincre l'emprise du Roi-Sorcier, ils devront mettre leur orgueil de côté et panser leurs vieilles blessures.
Quoi qu'ils fassent, ils doivent agir vite, car leurs jours sont comptés et leur destin tragique est plus proche qu'ils ne le pensent.
Avec une romance palpitante, une magie envoûtante et une famille recomposée complexe, « Un frère perfide » est le final épique de la série de romance féerique « Les vestiges du royaume déchu », une histoire d'ennemis devenus amants.
Riche en action, émouvante et romantique, cette conclusion est idéale pour les lecteurs en quête de danger et de suspense, mais aussi de la douce sensation d'une fin heureuse et réconfortante."

J'ai écouté « A Devious Brother » de Day Leitao, narré à nouveau par Caitlin Kelly et par un nouveau narrateur, Eden Gabay. Cette fois, le narrateur masculin m'a totalement conquis. J'ai été agréablement surpris par ce changement ; cette nouvelle voix sert à merveille l'intrigue et la personnalité des différents personnages.
Si l'absence d'Astra et Marlak s'était fait sentir au début du tome 2, ici, chacun ici est pleinement présent. Leur lien d'ame sœur est mis à rude épreuve et ils devront tout faire pour se retrouver. J'ai beaucoup apprécié leur histoire.
Lidiane et Azur renforcent leurs liens et cessent enfin de combattre leur lien d'âmes sœurs (quel soulagement !), et font face à leur passé respectifs. Tarla et Renel devront utiliser leurs talents sans magie pour vaincre le mal et surmonter leurs différends.
Jusqu'à l'épilogue, j'étais persuadé que Ziven et Mirella auraient droit à leur propre histoire, mais non. Leur histoire manque de développement, et c'est pourquoi je ne peux pas attribuer cinq étoiles à la fin de cette série. Cependant, j'ai constaté que tous les fils narratifs étaient noués, et nous comprenons enfin le titre de la série : « Remnants of the Fallen Kingdom ». Et surprise ! Plusieurs personnages pourraient porter ce titre.
Peut-être aurons-nous droit à un spin-off centré sur leurs enfants et un voyage dans les Nowhere Lands… Astra a-t-elle encore de la famille ? Qui sait…
4,5 ✨ !
This entire review has been hidden because of spoilers.
Profile Image for Charlotte Andrea✨.
236 reviews11 followers
February 14, 2026
This series have been so fun and I love all the characters so much! I especially loved all the action, magic, worldbuilding, and emotional character development in this final book. It’s so nice to see characters accepting each others faults and healing despite of them and not always overcoming them. It shows that it’s so many ways to be strong and it felt really relatable.

“I want easy love. Calm like a river. (…) But also solid like the earth. I want our love to grow strong slowly. And I’m honored that you want me.”

Thank you so much Day Leitao for the eARC of this wholesome conclusion to an epic series! 🤩

“You know what I’m thinking?”
“You can think already?” I grimace and place a hand over my heart. “Oh, what a poor job I must have done.”

🗡️ Several POVs
🩵 Complicated Found family
👑 Fated mates
🗡️ Epic action and secret identities
🩵 Elemental magic
👑 Enemies to lovers
🗡️ Forced proximity
🩵 High-stakes romances 🌶️🌶️
👑 Snarky banter

"I understand that hanging onto false hope can feel like delaying the pain of finally admitting defeat. It’s like keeping it under the surface, where it still hurts, rather than accepting one’s fate. But at the same time, lingering hope, even if pointless, will keep you fighting until the end."

Like in book 2 I also missed our main couple as some of the others outshone them a little. I loved the ending that made up a bit for it, but would have loved more emotional scenes and action scenes with them together.
This time around, I had some struggle to keep up with all the 8 POVs at some parts as their group is quite a complicated found family that travels a lot and deals in lots of different magic. It wasn’t all the time, only when the group were divided in several places, so it didn’t take away too much from the story.

PS: I got this eARC while I was sick and had to reread it from the beginning with the audiobook. The audiobook is really good so I do recommend that too!
Profile Image for organisedchaosbooks.
362 reviews7 followers
March 10, 2026
A Devious Brother surprised me in the best way. I went in expecting action, but this book delivers a full‑throttle, plot‑driven ride where every chapter drops a new piece of information that changes everything. It’s sharp, layered, and constantly moving, the kind of story where you realise you’ve been holding your breath without noticing.

What I loved most was how the relationship dynamics stay understated yet meaningful. Nothing is overplayed; it’s all in the glances, the tension, the shifting loyalties. Those subtle emotional beats threaded through the chaos made the stakes feel even higher.

The mystery elements were a standout for me. The reveals land with precision, and the way the author ties each thread together feels intentional and clever without ever slowing the pace.

The audiobook added so much atmosphere. The narrators captured the tension and urgency perfectly, making the twists hit even harder.

A huge thank you for this ALC. All thoughts are my own.
Profile Image for Amy.
1,558 reviews6 followers
March 15, 2026
A beautifully written series comes to an end. I really enjoyed this story. The characters written so vividly and the world building was amazing. So many secrets unfolded in this last installment . Enemies even helped with the witch king. The steamy scenes were tastefully written. The actions scenes were pretty neat . The ending was nice and better than I expected . Now the narrators did a phenomenal job with all the characters male and female. This is a series I would definitely re read.
10 reviews1 follower
March 1, 2026
Unexpected

When I began this story , I struggled to get invested. I endeavoured and it paid off. It isn't really an enemies to lovers, more a lot of poor communication. The building of Astra's character made her seem very self involved and she over thought everything. Slowly, as more characters are introduced, and the story develops, her character as a catalyst works more. The crystal court and its history and present really bind the story and connects all the players. They all have a distinct role. Overall, I really enjoyed the series. So, thank you to the writer.
Profile Image for Becca T.
193 reviews4 followers
December 30, 2025
I’m at a loss for words, the third book in the series packs one hell of a punch!

I absolutely adored the first two books and was fortunately able to read them close together and absorb every bit of detail from the opening of Astra and Malark’s story, into the second book which comes from multiple POVs, I was fully immersed in the series and have been patiently waiting for book three. I was worried I’d forget key plot points but thankfully after just a couple of chapters it quickly came flooding back and I was once again deep into the plot of our wonderful characters.

This book feels like the perfect delivery of closure - you’re probably thinking duh, it’s the third and final book - but often we get to the “final” book and then there’s plot points left unfinished, this is 100% not the case. The author has worked their ass off to knit together SO MUCH info from SEVEN POVs with the cutest little bow it’s outstanding.

What’s even more impressive is how Day writes each character, it’s almost as if they’re written by different authors as they *sound* so individual, even when I’d take a break mid-chapter, I could resume reading and within a few lines know exactly which character I’m with.


******SPOILERS AHEAD******



I LOVED so much of this book, it’s hard to summarise but the key parts were:
- the soulmates, so many beautiful soul mate bonds - not a single character that we grew to love is left without a partner, and they all get a happily ever after. Yes x100000
- the strength of Malark’s vulnerability, he’s a tough, macho man who almost gives off caveman vibes of neeeeeding to protect his wife but he sits in front of his friends, and frenemies, and admits his power scares him, he’s overwhelmed and doesn’t feel like he can do what they need him to do. And not only that, he relents and encourages Astra to whoop ass by borrowing his magic to defeat Zorwal and Otavio, AND THEN he steps up and delivers the final blow to the Witch King - chefs kiss for our hero
- I love love love the scenes with Cherry Cake, I love how he swoops in to save the day like a well timed gif in a group chat, I’m so pleased he got his HEA too
- The character growth in this book was insane - Renel and Azur in particular, I really really hoped that they’d re-connect and put their bond behind them, and I’m hoping that Renel being present at Azur’s wedding speaks for itself

There’s so much more I could go on to say, but most importantly, the series is now finished, it’s the perfect time to dive into a truly unique romantasy with incredibly well developed storyline, characters, world etc. everything you could want
Profile Image for Rebelle.
204 reviews6 followers
February 24, 2026
I cannot believe it’s over!! I loved this series and loved getting to know the characters! I especially loved when they all started coming together and interacting as a large group and seeing their dynamics. The story was heart wrenching at times and the emotions were everywhere but it stuck with me! I’m so glad I re read book 1 & 2 before jumping into this one because the whole series flows so well. Not to mention the gorgeous covers all look amazing together. Will definitely be revisiting this series when I miss the characters too much!
Profile Image for Tori.
1,115 reviews11 followers
December 31, 2025
Rating: 5/5
I received an eARC for my honest opinion.

A Devious Brother is a powerful and emotionally rich conclusion to this epic story. From the opening chapters, you can feel that everything has been leading to this moment. The final battle is intense, layered, and deeply meaningful not just because of the action, but because of what it represents fothe characters who have fought so hard to survive, protect, and atone.

One of the greatest strengths of this book is how well the multiple POVs are handled. Each perspective adds clarity and depth rather than confusion, allowing the reader to fully grasp the scope of the conflict and the emotional stakes tied to it. Every POV feels purposeful, giving insight into motivations, fears, and hopes, and showing how each character plays a vital role in bringing this story to its conclusion.

Marlak’s journey was especially compelling to watch unfold in this final installment. He is a character shaped by pain, loss, and difficult choices, yet never written as one-dimensional. What truly stood out was how his relationship with Astra became a source of light for him. Her love allows Marlak to see the good within himself, something he has long struggled to believe in and challenges him to look at others through a lens of understanding rather than resentment. Seeing how Astra really helped to shine a light on all the characters that most didn’t trust or like was great to see, I loved getting to see each character shine and really shine.

The supporting cast is just as strong, each character feeling fully realized and essential to the story. Their individual journeys, loyalties, and sacrifices make the ending feel earned and impactful, reinforcing the idea that this was never just one person’s fight, but a shared battle with lasting consequences.

A Devious Brother is more than an epic finale; it's a story about redemption, love, and the courage it takes to choose compassion after hardship. Day Leitao delivered a conclusion filled with heart, depth, and purpose, making this a truly unforgettable ending.

I want to thank the author for the opportunity to review this book.
Profile Image for Stephanie.
32 reviews
January 9, 2026
Before reading this, I went back and re-read the first two books to have everything fresh in my mind. This series features enemies-to-lovers, secret identities, found family, fated mates/soulmates, tragic histories, and forced proximity. Marlak is trying to believe and trust that his brother is telling the truth when he wants to help find Astra, knowing that she is with Azur, who worked for his brother and hates him. I love how we get to see the story from the perspective of so many people. In A Cursed Brother, I fell in love with Marlak and Astra, Ziven was growing on me, and I wasn't quite sure if I liked Tarla. When A Traitor Sister started, I hated Renel for what he did to his brother, and by the end of the book, we learn that the memories of what happened the day Marlak believed he lost control of his fire, causing the death of his family, did not happen as he remembers. We start learning more about each person, what made them who they are now. There are a lot of unlikely allies in book 2, which continues in A Devious Brother.

One of my favorite things about Astra I love is how she tries to see the good in people and their reasons for the choices they make. She is put in a position where she is trapped with her husband's enemy, Azur, yet she still chooses to believe he will help her despite knowing he is bound to serve the very person they are trapped with. She is determined to save them both. Throughout this book, you see people become allied with the most unlikely people, and I definitely did not expect a few of the twists. I want to say so much more, but I do not want to give any spoilers.

This is a series with heartbreak and healing. It's about loving someone, broken pieces and all, truly seeing the other person. And lastly, it is about finding love and fighting for it, never giving up on the other person.
Profile Image for Alyssa .
45 reviews
February 7, 2026
This book was messy, intense, and completely addictive in the way dark romance is supposed to be — and it officially earned this series a spot in my top 5.

A Devious Brother leans hard into morally gray territory, and I honestly loved that it didn’t try to soften its edges. The tension is thick from the start, the dynamic is unhinged in the best way, and the emotional manipulation? Deliciously uncomfortable. Day Leitao does a great job of making you question your own reactions — because you know you shouldn’t be rooting for certain moments… and yet here you are.

The characters are flawed, impulsive, and often frustrating, but that’s what made them feel real. There’s a constant push and pull that kept me turning pages, and the power imbalance adds a layer of darkness that won’t work for everyone — but if you’re into taboo-leaning, toxic romance that doesn’t pretend to be wholesome, this one delivers.

This series lives rent-free in my head now. It’s bold, unapologetic, and completely committed to the chaos — which is exactly why it’s sitting comfortably in my top 5 dark romance series.
Profile Image for Carmen.
959 reviews2 followers
February 14, 2026
Great series

Loved this series they all had different agendas but the same goal in the end to kill the terrible king they made alliances and found out things they didn't know about them selves and others family found each other and of course they found there soul mates there was giants nimps and so much more
Profile Image for Anne Marko.
248 reviews29 followers
January 20, 2026
A fantastic conclusion to a trilogy. In the first two books you fall in love with all the characters amongst all the action. In this book, the characters still continue to grow and develop as the story concludes. The ending did seem a bit abrupt compared to the pacing of the rest of the book, but it’s satisfactory and entertaining. Great Romantasy!
Profile Image for Roberta Hawes.
469 reviews
January 28, 2026
Great conclusion to a really great trilogy! This was nonstop adventure! Super fun series. Spice is there, but not overdone.
2 reviews
February 1, 2026
Great Series!

Loved this series! A great choice for ACOTAR fans looking for a new read. Great characters, lots of adventure, magic, romance and satisfying HEA. Highly recommend.
Profile Image for Beth’s Book Collection.
423 reviews28 followers
December 24, 2025
"I want easy love. Calm like a river." He kisses the corner of my mouth. "But also solid like the earth. I want our love to grow strong slowly. And I'm honoured that you want me."

⭐️⭐️⭐️⭐️
🌶🌶🌶

What you'll find in this book:
• Multiple POV's
• Soulmate Bonds
• Snarky Banter
• Epic Action
• Elemental Magic
• Fae Courts
• Scary Cinnamon Roll MMC
• High Stakes
• Fierce & Kind FMC

I can't believe this series is over, having journeyed with these characters throughout three books now I've come to fall in love with the characters, and their varying personalities, relationships and dynamics. One aspect of these books that I truly enjoyed was the found family dynamic that flows throughout this series. Where we initially start with one small tight knit group of characters that shifts and grows as the book goes on. Getting treated to a whole range of POV’s during this final book in the series felt so fitting considering the complex nature of the tale being told, and the multiple storylines all happening at once as the characters face challenges on their quest to save their world and garner peace. I’m always a sucker for a series with a guaranteed HEA and Day delivered on this beautifully, although I do feel that there is room for more especially when it comes to the more side characters and their futures, I was still so pleased with the ending.

The Witch King has awoken from three centuries of slumber and Astra must find a way to prevent him from breaking free of his magical prison. Alongside an ally that is both untrustworthy and mysterious, Astra with the help of her friends she has to navigate secrets, betrayals and old bargains for a chance to save the world and those she loves. Marlak, while surrounded by enemies with his magic being tracked learns that the key to saving his wife and his friends is to use an element he swore never to touch again. In order to wield this he will have to overcome the horrors of his past, all the while the Witch Kings power is growing. Astra and Marlak will need the help of everyone that is willing to provide it including an unlikely group of heirs and outcasts including old enemies and reluctant allies. If they can ever hope of overcoming the evil threatening everyone and everything they must put aside old grudges and work together. With their plans crumbling quickly they must act fast as their days are numbered.

I adore Astra, I loved her when we first met her but watching her grow and come into her own over the course of the series has been amazing. She is so steadfast in her beliefs and is always more than willing to see the good in people despite the betrayals that she's experienced. Her dynamic with Marlak has also evolved so much over the course of the series, and I enjoy that we now get to see them in a happy relationship with one another even though they keep getting unwittingly pulled apart. In this book it is Marlak that we see undergo the most development, he has to face his past and his trauma in order to be able to save those he loves. Everyone in this story has a part to play and nothing would have happened if the respective puzzle pieces didn't fit together. We get to learn so much more about the other more side characters of the series during this book with the multiple POV's Day has in place. I thoroughly enjoyed getting to know these characters more and exploring more of this world through their eyes. During this book I think Azur became my unexpected favourite character, I enjoyed his refreshing outlook on the other characters and their flaws while also his self reflection.

The pacing was excellent, fast enough to keep me interested but not so fast that I couldn't keep up. I thoroughly enjoyed how this story twisted and turned to provide us with a story that compliments the characters, their evolution as well as the centerpiece of the story, defeating the Witch King. The spice dotted throughout this book was great and felt super relevant to the storyline and the characters, moments of connection. This book gave me that happy ending I was looking for, but I do feel like of Day decided that there could be room for spin off books in this series. I have questions that could be answered, but at the same time if this is how the story ends I will not be complaining. If you're looking for a complete trilogy to sink your teeth into into the new year then this one is perfect.

Thank you so much to the author for sending me an e-ARC to read and review early.

Author: Day Leitao
Series: Remnants of the Fallen Kingdom
Publisher: Independently Published
Release Date: December 23rd, 2025
Pages: 424
Profile Image for Megan O'Brien.
706 reviews5 followers
December 30, 2025
I wish I loved this ending as much as I loved the rest of the series!! The concept that started this series out was so strong, and this finale (while still exciting and good) seemingly traded a lot of the character growth and deep relationships we’d come to love for a lot of plot with some real racing pacing…

Astra, Marlak, Lidiane, Azur, Tarlia, Renel, Mirella, and Ziven are all back for the final stretch in their battle against the witch king - and if you counted correct, that is in fact 8 different characters whose POVs we follow throughout the book!! It’s a lot to keep up with, but they’re also all doing a lot of different things across the entire world of the book, trading groups, meeting with different royalty, hunting down the Witch King and his allies, just casual everyday activities (jk). As things get stressful and lines in the sand have to be drawn, our unlikely gang of friends (somehow also a perfect number for pairing off) bands together and pools their magic in some really cool ways!

While Astra and Marlak are technically our A-Couple and storyline, this book really drew me to Lidiane and Azur both individually and as a couple - lots of complex emotions and relationships, lies and deceit in the name of love (toxic but fun), and hopefully a happy future. Of all the couples, they got the most substance - and as a character, Azur got so much to do this time which was thrilling because he’s always been a fascinating character to me with his mysterious past and strong capabilities with magic.

While this wasn’t my favorite of the series, I really enjoyed the overarching story and getting to live in this world with the characters! Thanks so much to Day Leitao for a chance to read this in exchange for an honest review.
Profile Image for Aubrey Etue.
36 reviews
February 22, 2026
Firstly, thanks to Day for sending me an eARC!!!
4.5⭐️

I was so excited to jump back into this world after the CRAZY plot twist and ending of book 2 and we promptly pick up right where we left off. I loved getting to watch this group of unlikely allies grow and develop throughout the series but especially in this book. The ebbs and flows of dealing with anxieties, insecurities and vulnerabilities was extremely relatable and made the characters easy to love.

After an absolute rollercoaster series of events, every single character is able to get a HEA, and that warms my heart so dang much. Everyone is paired off with their soul bonds so no one was left out and frankly, they all deserved to win, in every way possible so seeing them all find their places and their people after going through so much, was definitely needed.

The only reason this is 4.5 stars for me is because I felt just a tad thrown around with 8 different perspectives. But let me follow that up with the fact that I loveeeee all of the characters, but selfishly, I really wanted more time with Marlak and Astra.

All in all, a great ride, easy to love characters, relatable emotional themes explored, and super satisfied with the ending that everyone got (including our favorite unicorn Cherry Cake)!
This entire review has been hidden because of spoilers.
Profile Image for LateNiteSnacks.
21 reviews
March 14, 2026
This has soooo much potential and I would love to see this reviewed and edited cause I just know it can be so much more than this! I really tried but just DNF at 27%. There were too many pov changes for me to really develop any bond with the characters. So many things felt sooo shallow and not explained. Specially between the brothers. This could’ve been such a great chance for the brothers to actually talk and remove any misunderstandings. It’s insane that Renel’s personality doesn’t move past not having magic. Did he really want Marlak dead? Theres barely any background letting us know why he hates Marlak or did what he did other than seeing Marlak and his sister practicing the magic he so desperately wished he had. It feels so shallow. Theres not even a flashback showing what this relationship was like before the fire. How could years of a sibling relationship be overwritten by one man so quickly. I just don’t understand.
Profile Image for Renae Simangan.
177 reviews2 followers
March 18, 2026
It’s been a long time coming! But it was a great journey. Book 3 wrapped everything up so well. We got to learn more about Astra’s magic and her background. We got to see relationships form and mend.

Although after three books I do feel like the battle with the witch king was very anticlimactic. I was expecting a little more from Marlak. But I like how he fought the witch king with his sibling by his side.

Overall, this was one hell of journey and I enjoyed every bit of it!
Profile Image for Hope Archer.
65 reviews
February 8, 2026
I didn't love this as much as the other two. A lot going on and the way things resolved was really surface level. However, if you asked me did I enjoy the series? The answer is yes
Profile Image for Solos Mechalis.
238 reviews20 followers
April 16, 2026
Astra looks at me, worry in her eyes. Does she doubt me too? She then asks, “What if you went to the castle today? For the notes?”
I don’t know if I can wait that long. “Astra⁠—”
.
/
This is just one example, previous book was filled with such indecisiveness. He is MMC who has been on run since childhood. I wonder how he survived all those years, by sheer dumb luck.
These thing alone do not matter much but series as a whole was riddled with plotholes and I was spending my time justifying MMC and FMc poor decisions instead of enjoying the actual book.
Profile Image for Ginny.
81 reviews
April 28, 2026
3.5⭐这本也是多视角,揭开了几个身世之谜,也发展了一对新couple,至此所有关键角色都成双成对了。但对大boss的描述不多,双方实际对峙的画面也很少,几乎不费吹灰之力就把他打败了。我愿称之为史上最弱大boss😄
Profile Image for Lauren Penner.
194 reviews7 followers
March 4, 2026
It’s so hard to say goodbye to these characters. This was a fun read! I love when side characters turn into main characters and this book did it perfectly. Action packed, spicy, and with lots of magic wielding.

Can’t wait to complete the special edition set. They are going to be so pretty together.
83 reviews1 follower
January 25, 2026
The gang is back!

A Devious Brother concludes the Remnants of the Fallen Kingdom trilogy and what a ride it was! While I was still not a fan of the multiple POVs and the indecisiveness, I still very much enjoy reading ADB even to the point of being up until after midnight to finish it. I was happy to see Astra and Marlak reunited once again with their love and connection still very strong. Their interactions with the other characters was quite chaotic at times and filled with sarcasm and a whole lot of snark but in the end this rag tag group accomplished what the needed and dare I say, even became family in the end.
I really liked the characters’ growth and the way Day tackled some of the issues they had. They don’t magically disappear but rather, the characters learn to learn to live with it! Some realness in a world of fantasy!
All in all I enjoyed ADB and look forward to reading more of the author’s work.
Profile Image for Chantelle Raines.
115 reviews
January 16, 2026
I have loved this series so much and am sad to say goodbye to all of these characters.

I enjoyed getting to experience all the pov's in this one and I loved that we got more backstories for this book. I was a little shocked with how rushed the end of the book felt. Everything was wrapped up wayyy too quickly and neatly, and I wish the ending had a little more time. To say all of that though, I was happy we got closure on each of their stories.

Azur and Lidiane were by far my favorite characters in this book. A few of the other characters were a little too immature for my liking, but hey that's the point of different characters.

If you're looking for a fun adventure with magic, magical creatures, and a center core of found family you'll love this series.

Thank you Day Leitao for providing me with an eARC in exchange for my honest review.
Profile Image for FS Meurinne.
Author 2 books135 followers
December 29, 2025
This was an emotional and satisfying finale that reminded me why I fell in love with this series. From the moment the Witch King awakens, the tension never lets up. I loved watching Astra step fully into her strength as she navigated betrayal, impossible choices, and her devotion to those she loves. Marlak's journey was compelling; his struggle with his past and forbidden magic added real emotional weight. The multiple POVs worked beautifully, giving depth to both primary and secondary characters, and the found-family dynamic truly shone. Packed with action, magic, romance, and heartfelt moments, this book delivered high stakes and a warm, well-earned ending that left me smiling long after I finished.
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