"An atmospheric, satisfying YA sci-fi thriller" - Guardian "An ominous, evocative science-fiction thriller" - New Scientist Lily's emotional problems run deep - three miles deep. After she gets kicked out of school for her destructive behaviour, Lily agrees to an unusual fresh start: going with her mum to live at Deephaven, an experimental deep-sea mining rig and research station located at the bottom of the ocean. Lily instantly regrets her decision: claustrophobic and isolated, it's hardly her idea of home. Turns out, Deephaven has problems of its own. The head scientist, they quickly learn, has disappeared - just as he was on the brink of a shocking discovery. In the darkness of the deep, something is stirring ... something dangerous. And it's calling out to Lily. - Nominated for the 2024 Yoto Carnegie Medal for Writing - A mind-expanding thriller set in the ocean's depths, a terrifying struggle for survival - and the story of one girl's path to self-acceptance - Perfect for fans of Lauren James, Marie Lu and Marissa Meyer