Missing - Have you seen this girl? Nineteen-year-old Leila Hawkins was last seen on June 24, 1994, when she left her parents’ anniversary party early and ran into the stormy night wearing her twin sister Stella’s long red coat. She was never seen again.

I wrap my arms around the tree trunk, pressing my cheek against it until the bark digs in and the missing poster is finally secured. I try not to look at the photograph on it. At the features so similar to mine. Perhaps this will be the year someone comes forward.

Were crucial mistakes made by detectives from the very beginning?

Could the pressure of living two lives have led my sister to run away - or even end it?

Or did someone in her tight circle of friends and family have reason to want her gone?

Someone out there must know something.

But the last thing I ever expect is a direct response from the person who took Leila. Wracked with guilt and completely alone in the world without the other half of me, I have no choice but to agree to his strange request: private, intimate details of my life in return for answers.

As the final moments of my sister’s life play out before me, I feel closer to her than I ever dreamed I’d be again. So close, it could almost be happening to me. But when I finally realise who is behind this terrifying tragedy, will I make it out alive?

From the best-selling author of The Perfect Friend, this absolutely gripping psychological thriller will keep you up all night and leave you sleeping with the light on. If you loved Gone Girl, The Girl on the Train, and The Wife Between Us, this book is for you!