Hot Key Books has signed a book from actress and writer Emerald Fennell.
Emma Matthewson, editor-at-large, signed UK and Commonwealth rights for Monsters in a deal with Sophie Hicks at the Ed Victor Agency.
The blackly comic book is described as "The Shining meets the Curious Incident of the Dog in the Night-Time", and follows two lonely and sinister children over the course of a summer in Cornwall with a serial killer on the loose.
Fennell's debut children's book, Shiverton Hall (Bloomsbury), was shortlisted for the the Waterstones Children's Book Prize 2014.
Matthewson said: "Emerald has already achieved such acclaim for her fiction for younger readers. This starkly different and uniquely macabre tale for older readers will be both extraordinary and memorable."
Monsters will be published in spring 2016.