Bestselling author Katherine Webber pens a highly-anticipated and swoonful new spin-off to the Sunday Times bestselling YA romantic fantasy series, Twin Crowns.

Bursting with epic adventure, romance and humour on the high seas. Someone is making waves ...

Captain Marino Pegasi.

Wedded to the sea.

Immune to love.

Until now ...

Captain Marino Pegasi is never happier than when he's exploring the oceans. But when his beloved sister, Celeste, falls gravely ill, he is forced to go on a desperate search for a cure. Little does he know that in his search he will find so much more lying beyond the horizon. Does Marino's fate truly lie in the hands of a bewitching, mysterious mermaid ...?

New for 2025, an epic new romantasy for young adults from the bestselling world of the TWIN CROWNS series.

About the Author

Katherine Webber is the co-author of YA fantasy rom com series Twin Crowns with Catherine Doyle. Katherine is from Southern California and spent much of her childhood in the Palm Springs desert. Her debut YA novel was the critically acclaimed YA novel Wing Jones. For younger readers, she also co-writes the Sam Wu is Not Afraid and Sunday Times bestselling Dragon Mountain series with her husband, Kevin Tsang.

Reviews

Praise for the Twin Crowns series

"Twin Crowns cast a spell on me from the very first pages with its glittering blend of harrowing adventure, charming wit, and intricate world-building. Add in delightful romance and two unforgettable narrators, and I was thoroughly bewitched by this marvelous book! Don't miss it!" - Sarah J Maas, #1 New York Times Bestselling Author

'An absolute delight from start to finish, Twin Crowns is a dazzling gem of a book. Magical, clever, surprising and pure fun. If you love wicked kings, sexy bandits and sister stories that are full of heart, this is a must read' Stephanie Garber, New York Times and Sunday Times bestselling author of Caraval

'Twin Crowns has all the charm of The Princess Bride and all the stakes of Game of Thrones. Addictive, swoony, tender and vivid - I loved it with all my heart.' - Kiran Millwood Hargrave, bestselling author of The Mercies and The Girl of Ink and Stars

'Riotously funny, fast-paced and dripping with romance, TWIN CROWNS manages to deliver a tale as familiar and nostalgic in the way of childhood blankets and fireflies in jars, while at the same time wholly refreshing with its levity, charm and quirky tale of sisterhood rediscovered. TWIN CROWNS is so joyous that days after reading, I'm still grinning.' - Roshani Chokshi, New York Times bestselling author of The Gilded Wolves and Aru Shah series

'Pure indulgence - a minibreak in book form' - Guardian

"Doyle and Webber give readers twin plots of daring deception, spectacular settings and two very appealing love interests... you'll root for both twins in this dangerous web of intrigue."

-Kendare Blake #1 NYT Bestselling author of the Three Dark Crowns series

'Reading Twin Crowns left me giddy. Adventure, romance, TWO incredible protagonists, magic, sisterhood... I loved it.' - Laura Wood, author of A Sky Painted Gold

'Fresh, funny and exciting' - Louise O'Neill, author of The Surface Breaks

Book Information
ISBN 9780008688523
Author Katherine Webber
Format Paperback
Page Count 384
Imprint Electric Monkey
Publisher HarperCollins Publishers
Weight(grams) 270g
Dimensions(mm) 198mm * 129mm * 24mm