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Wren's fourth mate just might be the death of her...that is if the world doesn't end first.
From USA Today bestselling author Lindsey R. Loucks and award-winning author Mysti Parker, get lost in a paranormal reverse harem series that will leave you breathless and begging for more!

Wren, true heir to the vampire’s Southern Clan throne, has recently joined the Kidnapped Multiple Times Club. She’s certain she’s sick of it—until she meets her latest kidnapper and potential fourth mate.

He’s dangerous. He’s lethal. He’s basically Idris Elba in leather. And he looks damn good in a tux.

He’ll make the perfect date for a cult party. The murderess queen will be there, and Wren can sever her crown once and for all. If he can be persuaded, that is.

Hawk—a highly trained assassin—wants to be left alone to do his job. He’s had a headache nearly forever, a throbbing one that beats in time with his strange new tattoo like a ticking clock.

Fitting since the woman named Wren has been prophesied by his granddad to end the world in one week.

One week. Hardly enough time to stop an apocalypse, much less to accept his role as Wren’s fourth mate.

Even if they save the world and sever the crown, their future together could be as unforgiving as the clock ticking down their final seconds—as Wren, Hawk, and all her other mates are about to learn the hard way.

**This is a medium-burn reverse harem vampire romance.**

190 pages, Kindle Edition

Published December 13, 2019

167 people are currently reading
169 people want to read

About the author

Mysti Parker

56 books768 followers
Mysti Parker is an award-winning author and shameless chocoholic. She writes romance for every reader's taste from super sweet to scandalously spicy. When she's not writing the next best-story-ever or tackling the endless mountain of laundry, she works as a freelance copywriter and editor. Mysti resides in Louisville, Kentucky with her husband, three children and too many pets.

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Community Reviews

5 stars
133 (46%)
4 stars
98 (34%)
3 stars
42 (14%)
2 stars
11 (3%)
1 star
2 (<1%)
Displaying 1 - 30 of 38 reviews
12.7k reviews189 followers
December 14, 2019
Absolutely outstanding as always. A girl and two sexy guys. What more could someone ask for. You definitely need to read the book quickly.
1,707 reviews12 followers
December 12, 2019
Queen Wren is going through some more difficult times being stuck in the bunker with three of her mates and now they have all been kidnapped and are hurdling into disaster in the back of a van but this time they are not in control of their own bodies and the person who is driving they have no idea whom it is but their tattoos give us a good idea of who but not the why. The whom is Hawk the assassin is the one driving and is absolutely reckless with their lives not that their alive their vamps and along with crazy witch Doreen and Zack who is the only human who could actually die. But still they have a lot of adventures going on in this book as well as lots of action and suspense and romance. The characters are great the story line keeps you entertained. I was given an Advanced Readers Copy per the author as a gift without obligation. I am providing an honest review.
Profile Image for Sherry Sias.
658 reviews1 follower
November 30, 2019
WOW!! This just keeps getting better and better. The relationships get deeper with Wren and her harem. Hawk, a hired killer, becomes the fourth member. The sex between these two could start a fire.
The revelation about Marlowe. The twists you never see coming. Amazing read and can't wait for the final book.
Profile Image for Scarolet Ellis.
7,445 reviews52 followers
December 22, 2019
Relentless: A Reverse Harem Vampire Romance (Sever the Crown Book 4) by Mysti Parker (Author), Lindsey R. Loucks is such an awesome story to read. This is book number four in this awesome series and I can not wait to read the next book in this series. I highly recommend this story to everyone.

I voluntarily read and reviewed an Advance Reader Copy of this book
Profile Image for Kathleen Bradbury (Bulfon).
16.4k reviews217 followers
December 16, 2019
I absolutely loved this book and was honored to have been able to read and review. It was such a phenomenal read and had amazing characters as well as an amazing story line. I just could not get enough of it and once I started reading it I could not put it down. I recommend that you read it.
236 reviews2 followers
December 15, 2019
"Oh. I was expecting…football player? You’re huge. No offense.”

Okay, I confess that I'm still looking up terms and learning to navigate in the world of paranormal romance - don't judge me by search history! After the last cliffhanger, I vowed that I would take it slow, read at a nice, leisurely pace, and prepare for the inevitable cliffhanger. Oh, and to wait patiently, between books. Yeah, THAT didn't happen! I tore through this one, like the devil was chasing me! I also didn't send any threatening e-mails to the authors - I totally cancelled those! ( I hope?) Who knew that the fourth book of the Sever The Crown series, by Mysti Parker and Lindsey R. Loucks, would be the most exciting and sexiest book of the series? In "Relentless," Wren has one week to find her fifth and final mate, and to stop the prophesized end of times - NO pressure! Expect drama, angst, mystery, suspense, danger, action, surprises, steam, oh, the steam, and romance. A thrilling read! I received this book as an ARC from Mysti Parker, and I volunteered this review.
Profile Image for Kaye.
7,177 reviews71 followers
December 13, 2019
ONE AMAZING ROLLERCOASTER!!!
Thrilling! This awesome, dynamic duo drops the bomb, jacks the thrill and blazes the trail, riding roughshod, melding this jewel together fluidly. Uncovering the plans with all the chaos, mayhem and shenanigans, propelling this little gem to life beautifully. Mastering the ups and downs, weaving a cocoon so intricately and tight, drawing you deeper into this tangled web until nothing else exists. Dealing with the drama, intrigue, turmoil, danger and suspense swirls, thrusting this baby into the eye of the storm, bursting it into a tailspin with stunning results. The chemistry builds as each layer is peeled back exposing an undeniable bond and amplifying affections, launching this gem to a whole new level. The personalities are well matched and blended with just enough flaws for diversity. The characters and scenes are strikingly sharp with abundant details and colorful descriptions so rich and lively, they blend and flow magnificently. Remarkable job guys, thanks for sharing this little jewel with us.
Profile Image for Carol Rupprecht.
783 reviews17 followers
December 15, 2019
When these books end, they set you up to hate Wren's next mate in the next book. You dive in mentally prepared to not like the guy, but then you end up loving him! Seriously, her parents knew what they were doing when they chose her mates. Relentless really showcased how passionate of a character that Wren is. Helping others who she barely knew. Even though she also did this in previous books, her actions now were a bit riskier and cost her much more, which made them mean more to the people she did them for. This book also threw some new twists and betrayals at us as well as bumped up the steam as Hawk and Wren got to know each other more. I could barely put this down, and after the ending, I'm desperate to see what Wren does about her 5th mate.
Profile Image for ROMEOISNOTFUNNY.
822 reviews13 followers
February 17, 2024
4th book, 4th mate. Meet Hawks, and his story is less dark in terms of the past, but it is very mysterious. He does what he does because he has to. And his sibling bond suffers for it. But because Hawk enters the stage, a lot of pieces to Wren's story and future fall into place.
Marlow, now settled, is such a smart sweetie, Charles and his humour is just what we need, and Ashe and his...well, not sure I would call ashe the heart after what happened. He also nearly left people to die in a bomb attack. Sooooo, anyway, he's still sweet, and after his loss, you just want to hug him.
Zac is not looking as innocent as he did. I trust him, but something is not right. He is hiding something. And his story does not slot in like you think it will, but wow, I didn't see it coming.
Smut yes, kick arse yes, twist! Oh my!
4.2 stars
Profile Image for Deb Barringer.
590 reviews4 followers
December 25, 2019
Relentless continues the story of the Sever the Crown series by Mysti Parker and Lindsey Loucks. It is an amazing, energetic, dynamic, well-written tale. Wren and her mates must battle Ravana, Doreen and other unsavory elements, all the while running against time to avoid an end-of-the-world prophecy. The storyline is fast-paced, filled with vampires, magic, danger, intrigue and romance. The characters are unique, each amazing in their own right. I can't wait to see how book 5 wraps up this incredible series!
Profile Image for Carrie O’Leary.
Author 8 books87 followers
December 15, 2019
Another fast paced adventure for Wren and co. The story picks up immediately from the cliffhanger of the last book. Wren quickly gets acquainted with her latest acquisition and things get rather spicy, in ways she hasn’t experienced previously. There’s just so much happens in such a short time, until you get to the last page and once more yell ”No...it can’t stop there.” One more book to go. Can’t wait!
Profile Image for Erika.
412 reviews2 followers
November 24, 2019
OMG this installment was just as good if not better then the others! When meets Hawks mate #4 & a killer! Lots of drama, love, twists & turns you don’t see coming, some sex & great relationships with her mates. I honestly couldn’t put this one down & almost screamed when it ended cuz I wanted to know more!! Book 5 can’t come fast enough!!! If you haven’t read this series you need to now!!
Profile Image for Jenny.
287 reviews
November 28, 2019
This story just gets better and better. The romance is hot and the build up to the severing of the crown is enticingly close. Wren and her mates are so close to the crown, but there are some pretty big hurdles for them to jump. There's kidnappings; hot sex;crazy witches; hot sex; betrayals and oh, some hot sex!
I can't wait for the next book - I'd say final, but I think some of these characters may have their own stories wanting to be told!
Profile Image for Karen L Ledee.
906 reviews5 followers
December 13, 2019
O...M...G !!! What an ending! I hope they are sending the next book really soon! Little more witch influence than vampire. We get a real opportunity to see Hawke in action and to understand how he ticks. There are some family tie surprises waiting for you. Lots of action, mystery and plenty of steamy stuff. Grabbed my interest to the point that I think I held my breath! There are a lot of characters to keep track of now.
I voluntarily read and reviewed an advanced reader copy of this book
Profile Image for Sadie Forsythe.
Author 1 book287 followers
July 21, 2020
Book four of five in a series in which the books do not stand on their own. So, it starts in the middle of the story and ends on a cliffhanger. It's OK, but the whole series has grown stale, each book just seems to be more of the same. It's not bad, it's just not adding anything particularly fresh with each new installment.
Profile Image for Niki Trento.
Author 1 book6 followers
November 23, 2019
How to write this review without spoiling??? Hawk...the killer...Wren and her men... Twists...turns...the unexpected...sex...intrigue...sassy boots and a poodle. I can't say what I want to because I don't want to spoil anything but... definitely the hardest one to put down so far!!!
Profile Image for Crystal.
1,258 reviews8 followers
December 14, 2019
Wren has found 4 of her 5 mates. They only have a week to find the 5th and stop the end of the world. SO much happens in this book. Things I didn't expect and some I was hoping for. I can't wait to see how things wrap up in book 5.
Profile Image for Rebecca.
4,063 reviews
December 2, 2019
What did I just read ?? What just happened ??? I need answers!!!! Now !! Freaking Zac . I hate the Demoness psycho known as the fake Queen . I need Wren to take her out ASAP
This entire review has been hidden because of spoilers.
Profile Image for Sue MacKenzie.
1,685 reviews15 followers
November 26, 2019
Woah this plot is just getting better with each book.
I am loving the way this going and the way the one ended just makes me itch to read the next one.
I really thought Wren would get her revenge in this one but maybe next time.
So looking forward to it, loving this series.
Profile Image for Marilyn Barr.
Author 44 books320 followers
April 7, 2020
Another action-packed fly-by-the-seat-of-your-pants tale with Wren and her guys. However, this installment is hot, hot. Hot. Hawke may not be Wren's first mate but that doesn't stop him from introducing Wren to many firsts. Hawke's personality oscillates between Ashe's gentle heart (still my fav harem member) and Charles' cavalier attitude. From Browen's poem, we know he's a killer but he won me over anyway with the relationships he has with his household. He's like a Cadbury egg: a hard shell with a marshmallow inside. Wren's confidence starts to build as she prepares for her final showdown with her aunt.

The plot twists and loops kept me guessing and the pages turning almost all night. The authors cleverly break the patterns set in the first three books to freshen the story. Overall this engrossing installment is full of surprises that fans of Wren will not want to miss.
Profile Image for Nigama R.V..
Author 10 books64 followers
December 30, 2019
Wren gets kidnapped yet again along with her mate Marlowe... Like always before, her kidnapper turns out to be another mate... So she willingly goes along to know more about the kidnapper, an assassin and the reason therefor... In the turns of events, she learns that she will end the world as predicted by the kidnapper’s Grandpa, a seer, who went into coma while doing so... Wren seeks her kidnapper’s help to fulfil her deal with the Angel and to secure a feather of his, which may be useful in winning the war... Will she gain her kidnapper’s trust??? Will she be successful in not creating chaos and mayhem??? Will she help the kidnapper’s grandpa??? What is destined for her??? One should read to know... The author has made the readers to run through the pages consecutively in the series with thrill, suspense and cliffhangers...
Profile Image for Chelsey.
767 reviews1 follower
January 9, 2020
Is Zac dead?

I still love Wren and Hawk may be my favorite harem member. I didn't expect that betrayal from Zac but u didn't like him from the beginning. The scene of Wren and Hawk's 'dinner date' made me uncomfortable. I didn't like Hawk touching another woman, even if Wren was the there too. That's mostly why I took a star off. I wish there had been a warning for that. But I'm interested to see what happens next and if Zac is really dead.
Profile Image for Rachel Osborne.
1,094 reviews19 followers
January 10, 2020
Sever the crown series has just gotten even better! Wow. I loved this book so much. Wren is so awesome and the men and just perfect. I love how the story has progressed throughout the series and book 4 gives us even more to the story. Book 5 can't come fast enough! Vampire book with the potential to being the best of its kind!
Profile Image for Karah.
196 reviews
January 11, 2020
The countdown begins....

This book continues on the vein of nonstop action. The writing remains superb but there was little character growth to be found. I will say that the fast pace is becoming a little much as it jumps from one disaster to another. I did like finally learning a little more about Zac. I’ll finish out the series but hope the conclusion tones down some.
Profile Image for The House Wife's Secret Library.
1,266 reviews
August 2, 2021
This was a good read. Fast-Burn Reverse Harem with some steamy scenes. I feel like there were times the story went by slower than others but overall a good read. I wish we figured out all her mates sooner than later. This is the book that I skipped over parts of to get to the final book because my patience grew really thin.
Profile Image for Jodi Kimball.
762 reviews
January 6, 2020
What a ride!

Relentless was so intense I could hardly put it down! Car chases, assassins, apocalypse! Oh my! And a cliffhanger! The next book is out in less than a week, what am I to do?!
Profile Image for SLS Sparks.
434 reviews13 followers
January 22, 2020
Not found of this one

I was not really fond of this book but will finish the series. I am pretty selfish when it comes to my reverse harem stories and didn’t particularly like the sharing of the DBG.
Profile Image for T..
Author 13 books573 followers
March 22, 2020
Relentless, the fourth book of the Sever the Crown series, is a book I picked up through Kindle Unlimited. Relentless had some good plot progression, and the relationships between characters tightened up. Such a great storyline, with plenty of twists to keep the reader wondering what's next.
Profile Image for Netta.
968 reviews14 followers
January 31, 2023
This one is my favorite so far because I think Hawk is fun even for an assassin and will seriously change Wren. I wonder what she will do about her fifth mate? Now it's really getting good! I am super excited for the end and can't wait!
Displaying 1 - 30 of 38 reviews

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