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Twin Crowns #5

King of Beasts

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King Alarik Felsing.

A lone wolf.

A frozen heart …

Deep in the mountains of a snow-swept kingdom, an ancient beast is stirring. When a beautiful young wrangler arrives to try and tame it, she is not expecting to tame the beast that lives inside the king too. But sometimes, all it takes is an unexpected spark to melt even the iciest of hearts …

A stunning new romantasy novel filled with magic, tantalizing romance and thrilling action.

498 characters ( 2000)

432 pages, Kindle Edition

First published January 29, 2026

53 people are currently reading
5254 people want to read

About the author

Catherine Doyle

29 books2,817 followers
Catherine Doyle grew up in the West of Ireland. She holds a first-class BA in Psychology and a first-class MA in Publishing. She is the author of the Young Adult Blood for Blood trilogy (Vendetta, Inferno and Mafiosa), which is often described as Romeo and Juliet meets the Godfather. It was inspired by her love of modern cinema. Her debut Middle Grade novel, The Storm Keeper's Island (Bloomsbury, 2018), is an adventure story about family, bravery and self-discovery. It is set on the magical island of Arranmore, where her grandparents grew up, and is inspired by her ancestors' real life daring sea rescues.

​Aside from more conventional interests in movies, running and travelling, Catherine also enjoys writing about herself in the third-person.

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5 stars
154 (48%)
4 stars
114 (35%)
3 stars
42 (13%)
2 stars
9 (2%)
1 star
1 (<1%)
Displaying 1 - 30 of 103 reviews
Profile Image for sarah ༊*·˚.
49 reviews1 follower
cart-worthy
July 20, 2024
how can i wait for 2026?? JUSTICE FOR ALARIK 😭
Profile Image for Claire ✨.
369 reviews65 followers
February 11, 2026
An amazing conclusion to the series and a great goodbye to the king of my heart Alarik Felsing.

This was SOOOO good. Romantic, adventurous, and so funny I genuinely cracked up a few times, KING OF BEASTS is a wonderful sendoff to the TWIN CROWNS series. People disappointed with the resolution to the love triangle in the trilogy, like I was, will definitely feel more satisfied here: Greta is a spunky, fun heroine and matched Alarik's energy very well.

This book is also sooooo much better than CAPTAIN OF FATES: better written, better plotted, and with better-developed characters, so if you were unsure whether to finish the series based on the fourth book, definitely give this one a go. I think Doyle had more time to perfect this one and it shows.

1. TWIN CROWNS ★★★☆☆
2. CURSED CROWNS ★★★☆☆
3. BURNING CROWNS ★★★★★
4. CAPTAIN OF FATES ★★☆☆☆

THE STORM KEEPER'S ISLAND ★★★★☆
THE DAGGER AND THE FLAME ★★☆☆☆



finally my king gets the recognition he deserves 😩👌
Profile Image for tappkalina.
747 reviews532 followers
3-tbr-yes
July 12, 2024
I haven't even read book 3 yet, so I guess I just spoiled the love triangle endgame for myself, but who cares, because this was the very few instances where I loved both of them equally.
Profile Image for _booktique2_ D Amora.
380 reviews697 followers
July 29, 2025
I can’t believe I just finished my pookie ALARIKS book. Like it’s over? That’s IT? Me need more😭😭😭
Profile Image for Emelie.
148 reviews17 followers
October 9, 2025
A Frostbitten, Fierce, and Perfect Goodbye – Infinity of Stars 🌟🌟🌟🌟🌟

An emotional, unforgettable and perfect conclusion to the series that owns my whole heart. King of Beasts is everything I hoped for and then it melted me with more.

With a looming war and an arranged marriage meant to protect his kingdom, King Alarik Felsing is a man burdened by duty, closed off to the idea of love—if his frozen heart can even want.
Struggling to tame the beasts around him, he calls upon a skilled wrangler, one who meets him with fierce calm, steady hands, and a soul wild enough to match his own: Greta Iversen.

Her fierceness lies in her gentleness, her wildness, her quiet strength. Greta doesn’t just wrangle the kingdom’s wildest beasts—she meets Alarik head-on, sees through him, and opens his eyes to a world beyond war.
Together, they are everything.

They are my favorite couple in the entire Twin Crowns world.
Greta didn’t just win Alarik’s heart, she won mine too.
She’s easily become my favorite book character of all time. Kind, steady, beautifully strong in both mind and soul—just as Alarik sees her. They are absolutely perfect for each other.

I couldn’t have wished for a more beautiful, soul-deep love story to bring this series to a close.
It made me feel the very same way Twin Crowns did when it first swept me away and reminded me why I fell in love with this world in the first place.

Alarik and Greta’s story is my favorite of all, and King of Beasts fits them—and this world—so perfectly.
Even as it concludes and closes the door of the Twin Crowns series, it doesn’t feel like a goodbye. It feels like a full-circle, heart-swelling ending that warmed me through and through. It left a key tucked in my heart and an echo of a beast’s roar that will live in my chest forever.
Profile Image for Emelie.
148 reviews17 followers
July 1, 2025
A Frostbitten, Fierce, and Perfect Goodbye – Infinity of Stars 🌟🌟🌟🌟🌟

An emotional, unforgettable and perfect conclusion to the series that owns my whole heart. King of Beasts is everything I hoped for—and then it melted me with more.

With a looming war and an arranged marriage meant to protect his kingdom, King Alarik Felsing is a man burdened by duty, closed off to the idea of love—if his frozen heart can even want.
Struggling to tame the beasts around him, he calls upon a skilled wrangler—one who meets him with fierce calm, steady hands, and a soul wild enough to match his own: Greta Iversen.

Her fierceness lies in her gentleness, her wildness, her quiet strength. Greta doesn’t just wrangle the kingdom’s wildest beasts—she meets Alarik head-on, sees through him, and opens his eyes to a world beyond war.
Together, they are everything.

They are my favorite couple in the entire Twin Crowns world.
Greta didn’t just win Alarik’s heart—she won mine too.
She’s easily become my favorite book character of all time. Kind, steady, beautifully strong in both mind and soul—just as Alarik sees her. They are absolutely perfect for each other.

I couldn’t have wished for a more beautiful, soul-deep love story to bring this series to a close.
It made me feel the very same way Twin Crowns did when it first swept me away—and reminded me why I fell in love with this world in the first place.

Alarik and Greta’s story is my favorite of all, and King of Beasts fits them—and this world—so perfectly.
Even as it concludes and closes the door of the Twin Crowns series, it doesn’t feel like a goodbye. It feels like a full-circle, heart-swelling ending that warmed me through and through— it left a key tucked in my heart and the memory of every wild heartbeat behind it.

It’s not a goodbye, but a full-circle, heart-swelling finale—an echo of a beast’s roar that will live in my chest forever.
Profile Image for Tuktuki.
1 review
November 29, 2024
I can't wait! I will storm into the bookstore on the release date and get Alarik asap 🥷. He deserves the best and I am sooo happy that his story continues 🥹🌬️💕.
27 reviews1 follower
Read
August 15, 2024
As much as I love the idea of this - Justice for Alarik ✊- I just can’t seem to grasp the idea of him with someone that isn’t Wren. They should’ve been endgame.
How am I meant to wait this long for it to come out 😭
I’m really exited about this book but it still makes me sad as I think about what could have been with Wren and Alarik.
But I’m sure it’ll still be good 😊
Profile Image for Iris.
142 reviews
Want to read
January 30, 2026
My song:
I want it
I want it
I want it I want it I want it
Hey! 💃
And repeat
Profile Image for Trish.
15 reviews
Want to read
July 3, 2024
Finally justice for Alarik!! 😭😭
Profile Image for Farah ♡.
334 reviews53 followers
Want to read
September 4, 2024
alaric my man.... only youll have me reading this...
Author 2 books50 followers
November 30, 2025
I received an ARC from the publisher in exchange for an honest review. It has not affected my opinions.

KING OF BEASTS is an epic send off for this world.

Gevra is the second most important country in the main trilogy, but the land and its people have always been seen through outsiders' eyes (mostly Wren's). I was so excited for this book to show us Gevra through its people's perspective. This is the book that shows readers why an icy land could be beautiful and be home to its inhabitants, not merely a dangerous, cold place.

I was also very excited to get inside Alarik's head. He was my favourite major (non-POV) character from the main trilogy. I appreciated that the book didn't go down the "he might be brutal but he secretly hates it" route. Of course, he is humanised (more so than in CURSED CROWNS and BURNING CROWNS) with more depth given to his reasons, but I'm very glad the cliché method for having brutal characters be love interests was avoided.

The book revolves around a dispute with Gevra's neighbour, Vask. I really liked that the plot evolved from the consequences of BURNING CROWNS. Gevra has been massively damaged by the events of that book and so the ambitious neighbour is taking advantage. So often books gloss over the consequences of the final battle (largely because they're ending there and want happy epilogues!) and I loved that this book interrogated that. This set up allows for plenty of action, including one major battle (that doesn't form the ending, to further kick the trend!)

The romance is as swoony as you'd hope from this world. It's not quite enemies-to-lovers but there's a certain antagonism between them (partly because Alarik keeps everyone at bay and partly because Greta dislikes what's happened to the kingdom under his rule). Once they find their common ground, their fledgling feelings then take on a forbidden aspect as he's engaged to someone else.

Like with CAPTAIN OF FATES, several characters from the main trilogy also get cameos - Anika, Tor, and Wren. It was lovely to see glimpses of them, particularly as they are the three with relationships to Alarik. Tor and Alarik's interaction was my favourite. Their relationship was an undercurrent of tension in the main trilogy and I really liked seeing it explicitly addressed.

I am so sad to see this series end, but we could not have said goodbye in a better way.
Profile Image for Emily G.
549 reviews27 followers
February 9, 2026
4.5 big fat stars for Beast Daddy Alarik Felsing

A bittersweet goodbye to the Twin Crowns series.

Alarik’s story was everything I’d hoped for and his connection with Greta was beautiful and honest. Seeing these two open up to each other was so heartwarming and it had all of my favourite tropes.
Profile Image for Abi.
105 reviews53 followers
July 20, 2025
Truly magnificent, my favourite of hers so far. This book reminded me that I’m not growing out of YA when masterpieces like this exist.

Read it for the beasts (both animals and man), read it for a new fmc to love, read it if you’ve read and loved Twin Crowns, read it if you haven’t. Just devour it and thank me later.

This book is full of pining and magic, full of life and well loved characters. I truly loved every single page and I don’t know what to do with myself now!

Read if you love:
🐺 Wild Beasts
❄️ Frozen Kingdoms
🌲 Pining, Longing and Slow Burn Yearning
✨ Royals and Magic
👑 Cameos from your fave Twin Crowns Characters

I also finally forgive Cat for the end of the Twin Crowns love triangle ❤️
Profile Image for Nija (love triangle apologist).
252 reviews3 followers
no
December 17, 2024
I'm not gonna read this after the mess that was Burning Crowns (I do not trust these writers with my fav), I'm just here to say what kind of wasted opportunity is it to have a Marino AND an Alarik sequel and NOT have them get together?? think about it. it would have worked so well. the closed-off ice king and the whimsical swashbuckling captain. going on a journey together and falling in love against all odds. they'd annoy each other so much. Celeste & Anika being matchmakers. we could have had it all
Profile Image for Natalie.
32 reviews1 follower
January 9, 2026
Thank you to NetGalley and Electric Monkey for allowing me to read this ARC in return for my review. All opinions are my own.

As a MASSIVE fan of Twin Crowns and its universe I was buzzing to be approved for this ARC, and it did not disappoint!

King of Beasts follows Greta Iversen (Tor’s younger sister) who is summoned to be the wrangler of King Alarik Felsing’s beasts, in preparation for an upcoming war. With the war looming, Alarik is set up for an arranged marriage in hopes to protect the kingdom.

Alarik is burdened by duty and he is closed off to the idea of love, his heart is made of ice and thankfully Greta melts it!

Behind Rose and Shen, these are my next favourite couple of the series. The slow burn was beautiful and was at the right pace, I really loved the relationship that they built and how they weren’t afraid to shout at one another. Some of their moments were really funny. It was lovely to see Greta come out of her shell and I felt like they both complimented each other well.

(Funny moments: every time Lief was there. He was hilarious and Alarik hated him so much! And also when Tor made his appearance!! I was literally kicking my feet!)

I thought this story was perfect to close the series. I am sad that the Twin Crowns series is over, I am hoping in the future that the authors will revisit! My first 5 star read of the year!

Also worth mentioning, a true YA novel, with no spice meaning it can sit in my school library.

Thank you again to NetGalley and Electric Monkey for allowing me to read this ARC!
This entire review has been hidden because of spoilers.
Profile Image for Lindsey.
118 reviews2 followers
Review of advance copy received from Netgalley
January 5, 2026
*I received an ARC via Netgalley*
I'm so sad that this is over! But what a fantastic end to this series. Alarik is my favourite character, so this is the book I was most excited for and it did not disappoint.
With Alarik's Kingdom on the brink of war, he needs a new wrangler. Greta was not only perfect for the job, but a perfect addition to this series. I truly enjoyed her character and her story.
I loved the plot for this book. The world building has been fantastic throughout the series, and I loved the imagery and descriptions.
This was an incredibly satisfying ending to the series. But I am truly sad that it is over. Once again, Doyle's writing did not disappoint!
Profile Image for Victoria | vicysboktips.
131 reviews3 followers
February 25, 2026
For det første, denne skulle hatt Wren i seg 😤 iykyk. Hadde gledet meg så mye til denne, men kjedet meg skikkelig første halvdel av boka 😭 Siste halvdel var heldigvis litt bedre, for det hadde gjort vondt å gi denne 2 ⭐️🥲 Favoritten er fortsatt bok 2 🫶🏻
Profile Image for Salima || salimateez.
281 reviews39 followers
February 1, 2026
Probably more like 3.75⭐️ bc there were some real corny bits wdym “what does the beast inside you crave’ girl heLP 😭 but otherwise,, this was so so fun I loved the characters & their dynamic 🥹🥹
Profile Image for Naomi.
119 reviews
March 4, 2026
Another brilliantly written story in the Twin Crowns series, focusing on the stone-cold King Alaric and the sympathetic, brave Greta Iverson.

The strength lies in its characters, both main and side characters. They are layered, written in-depth, and with emotion, making their chemistry easily feel real. Underneath Alaric's icy exterior, there is humor and love. Love for his family and for his country. He is a true king who cares for his people, albeit with a preference to protect them by means of war and violence. So when he hires his former wrangler's sister, he rediscovers this love and explores a new kind.
Greta, the youngest Iverson, proves that you can be emotional and brave, humble and wild. She is skilled with the beasts and eventually earns the respect of fellow soldiers (mostly) on her own. It is hard not to like her.

Their chemistry was sweet and pulled at my heart. How can't I be moved when a meant-to-be couple is faced with wars, conflict, and an arranged marriage? I also love how Princess Elva, the King's betrothed, has her own fierce spirit. I am very intrigued by her story! Of course, there are some recurring characters, such as Celeste, Tor, and Wren. It's always welcoming to have familiar faces around. We get to see Tor as an overprotective brother, and Wren's humoursly regality.

Besides the characters, the plot and pace were just perfect and interesting. I prefer fantasy books with some politics, as it inherently adds tension. I do want to add that the antagonist (Queen, what's her name) was far less detailed and a bit shallow. While she fulfilled her role and the enemy perfectly, there wasn't much story behind her. However, it didn't bother me anyway since she was evil anyway.

Final rating: 4.8🌟
Profile Image for Victoria.
185 reviews
February 18, 2026
⭐️3.5⭐️

I still believe Alarik and Wren had way too much chemistry between them for that to go to waste, but I am surprised by how much I enjoyed this book. Fun characters and an engaging story, with enough to keep it fresh despite being the fifth entry into the series.
Profile Image for Bethany Fletcher.
538 reviews14 followers
February 15, 2026
Thank God this was written by Catherine Doyle and not Katherine Webber. I still think Captain of Fates was shockingly bad and was very worried for King of Beasts. But Doyle raised the bar and I enjoyed this a lot. Very simple in the plot, and very easy to guess all the twists, but it is such a fun, quick read that it doesn’t even matter. A good end to the series.
Profile Image for Kaitlynne.
1,687 reviews53 followers
Want to read
October 14, 2025
someone please give this to me now, Alarik is my favorite
Profile Image for lit_eratka.
178 reviews4 followers
February 9, 2026
Strong 4

I'm not sure if this author is capable of writing something that I won't like at least a little

THE PLOT 6,5/10
I don't think the plot was developed enough, it's a pity it wasn't made into a duology
in the sense that everything was connected to each other, but I had the impression that it was a bit rushed, there were no plot holes, only decisions that did not quite fit the logic of the given characters
And unfortunately, it's was too predictable and cliché, but I forgive it!

FEELINGS 8/10
At first I didn't really know what to feel, then I slowly got drawn into the relationship between the characters, but even though it was quite slow, it wasn't slow enough for me (I mean, literally in my favorite book the characters only touch each other's hands after 1000 pages, so don't mind me)
I was generally hooked though, and I really liked how she developed the character development, especially in the context of this main series of Twin Crowns (WHEN WREN AND TOR APPEARED, I SCREAMED)

WRITING STYLE 8/10
For a book of this type, YA book, I really liked the writing style
Sometimes I missed the description of particular places or particular things, and my idea of it was quite vague, because it was clear that the author was focusing on this relationship, which generally makes sense because it's romantasy
Buuut I still enjoyed it, and I swam through this book like a salmon through swift rivers
177 reviews1 follower
February 12, 2026
I have been eagerly awaiting this story. Alaric was such an amazing character from Twin Crowns and I needed to see him get his own conclusion! I love that this book had a more subtle magic to it, the beasts and the quiet magic of a wrangler. I loved the descriptions of the setting too, Gevra sounds beautiful. I loved the characters, although I expected to see more of Wren and Tor than we did, the book didn't suffer for that. Greta was an amazing FMC and the supporting cast were well fleshed out. It may be more of a 4 star with some picky plot points but I loved the vibes so I'm ignoring any of those!
Profile Image for Amy Stocker.
Author 3 books47 followers
February 19, 2026
Oh, how I fell equally for Greta as I did Alarik, because I wasn't sure what to expect, but her being Tor's brother, I should have known.

Catherine Doyle never disappoints with her YA fantasy romances and this was a prime example of that. Greta is a beast wrangler, perfect for getting Alarik's animals under control - and also the beastly man himself. The setting is perfect for a winter's day, the bluntness of Alarik adding to the charisma of the man, and him falling for Greta first of course makes for a blossoming relationship. There are side characters such as Greta's sisters and Captain Vine that I really enjoyed, plus a cameo or two from Tor and Wren.

4.55/5.
Profile Image for Jaz.
159 reviews1 follower
January 27, 2026
4.25/5

I am honoured to have been able to read my favourite characters story early, thank you to tandem and electric monkey for gifting me an early copy to join the readalong in commence for the pub date!

The land of Gevra always enticed me, not just because of the King that resides there but for all the elements around it, the beasts, the frost fizz (I so wish I could try) the attires, Grinstad palace… I could go on, the allure is too great.

After my heart broke in the conclusion to the trilogy of twin crowns, I just knew their had to be more for Alarik, his story was unfinished so here we are - what a beautiful ending for him, the character was justly done and to see so much growth in such an icy brute was endearing, their shared moments were done with such care.

Greta compliments him in every way, the novel was perfectly balanced with tension, angst, action and thrill with comedic moments too - adorned with meetings from old friends as well as new with a nod to Captain of fates too. The beasties, the iversons, and subplot romances in side view. What can I say, just get a big blue ribbon out and tie a bow around it to conclude!

I thoroughly enjoyed the writing style, and only makes me want to see more and more from this author.

I feel lucky to have access to such a wonderful series which I think upon time and time again, and even though I’m sad it’s concluded, I can just go to my shelves and open the pages to throw myself right back into this beautiful world!
Displaying 1 - 30 of 103 reviews

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