A princess must have her prince . . .

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This action-packed YA debut pits a deadly siren princess and a siren-hunting human prince against each other as they fight to protect their kingdoms.

Princess Lira is siren royalty and the most lethal of them all. With the hearts of seventeen princes in her collection, she is revered across the sea. Until a twist of fate forces her to kill one of her own. To punish her daughter, the Sea Queen transforms Lira into the one thing they loathe most—a human. Robbed of her song, Lira has until the winter solstice to deliver Prince Elian’s heart to the Sea Queen and or remain a human forever.

The ocean is the only place Prince Elian calls home, even though he is heir to the most powerful kingdom in the world. Hunting sirens is more than an unsavory hobby—it’s his calling. When he rescues a drowning woman in the ocean, she’s more than what she appears. She promises to help him find the key to destroying all of sirenkind for good—but can he trust her? And just how many deals will Elian have to barter to eliminate mankind’s greatest enemy?

Praise for To Kill a Kingdom: “With well-crafted fight scenes and vivid descriptions, Christo has created a world of beauty and monstrosity that will draw readers in.” — Publishers Weekly

Published in: US/Canada (Feiwel & Friends – Macmillan), UK/Commonwealth (Hot Key Books – Bonnier Zaffre), Bulgarian (Orange Books), French (Editions De Saxus/Editions de L’Homme), German (dtv Verlagsgesellschaft), Hungarian (Konyvmolykepzo Kiado), Indonesian (Mizan Publishing), Italian (Fanucci), Polish (Young – Wydawnictwo Kobiece), Romania (Storia Books), Russian (EKSMO), Spanish (Océano Gran Travesía), Turkish (Marti Publishing Group), Portuguese (Editora Sextante), Ukrainian (Vivat).

Listen to an audiobook excerpt below:

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Click here for US/Canada (audiobook also available).

For UK/Ireland, head on over to Waterstones, Hive,, Book Depository or Amazon (audiobook also available). Or visit your favourite local bookstore in person!

For other countries/territories, you can order from your online retailer of choice, or visit your local bookstore!