The Secret Deep: an excitingly original teen thriller, split between a tropical island and a secret underwater world! - Softcover

Galvin is a thrilling storyteller, untangling a dense plot in brief, suspenseful chapters, her prose almost trance-like ... an inventive and touching story, from a novice who writes like an old pro. (The Telegraph)

Lindsay Galvin is a creative new voice in science fiction. Real science is used to create mind-blowing magic, in an underwater world that will take your breath away and give you gills instead. (Lauren James, author of The Loneliest Girl in the Universe)

The Secret Deep is an enchanting dive into a nimble and mysterious story that never loses its power to surprise, a simultaneously magical and visceral experience which kept me gripped until the last page. (David Owen, author of The Fallen Children)

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When Aster wakes alone on a tropical island, she has no idea what has happened, why she is there, or where to find her younger sister, Poppy. Meanwhile Sam, who once met the sisters on a plane, makes links between the mystery of their disappearance and suspicious happenings in his own life. In a stunning dual narrative, the truth unravels with devastating effect - and the answer lies in the secret underwater world surrounding the desert island, populated by the beautiful and the impossible ...