Helen Callaghan

Something deadlier than secrets lies beneath the surface in this atmospheric, heart-pounding new psychological thriller. Following their father's death, Cass and her sister Sid will do whatever it takes to keep their family's dive school afloat. It used to be the go-to destination in Cornwall for those keen to explore the ocean's hidden depths. But when Cass returns from a...

First class psychological suspense from a major new voice in fiction. Margot Lewis is the agony aunt for The Cambridge Examiner. Her advice column, Dear Amy, receives all kinds of letters, but none like the one she's just received: Dear Amy, I don't know where I am. I've been kidnapped and am being held prisoner by a strange man. I'm...