'Now we are bound forever,' she says, her eyes determined. 'I will never tell anyone, I swear. This is between you and me. Now you swear too.'

They called them the Orchid Girls. Grace. Charlotte. Molly.

One of them is in love. One of them is a liar. One of them is dead.

One day, on a jagged Dorset cliff, wind whipping their hair, waves crashing on the rocks below, threefriends became two – and no one knows the truth.

But somewhere lies a photograph waiting to be unearthed – waiting to reveal a secret that one of the Orchid Girls is desperate to keep hidden...

The Orchid Girls is a breathless, gripping and twisty story of love, obsession and dark, shocking secrets. Fans of KL Slater, The Wife Between Us and Paula Hawkins’ The Girl on the Train – read this one with the lights on…