A remarkable friendship, a close-guarded secret and a quest to the sea. Be swept away by Hannah Peck's new novel for readers aged 9 and up. Like many rivers, the banks of the Lyde hold a hoard of forgotten things: pottery, trinkets, a shard of glass.

They also hold a Memory. In the days of this story, the buried Memories were forgotten by most. But not by all . When Adderley discovers Ef - a being who seems part human and part fish - in the river by her home, she is drawn into an adventure that challenges everything she's learnt about the world.

Ef is searching for a special stone that she says has been stolen from her people. Could this be the key to the drought that is destroying Adderley's home? Together, Adderley and Ef resolve to recover the stone and return it to its true home, but the river waters are not always on their side and the journey is filled with danger.