Three close friends... Two unforgettable summers... One girl's darkest secret...

Alys appeared last summer, and then she vanished without a trace.

Ifan fell in love with her.

Hannah hated her.

And Marko regrets what they did.

This summer Cait is new in town, and a girl has been reported missing. Cait needs to uncover the truth. What happened last summer? And who is Alys?

"A powerful novel and utterly captivating. Excellent characters, who are relatable and complex, as most teenagers are!" - Armadillo Magazine

"A gets under-your-skin type of book and totally unputtadownable! It’s this summer’s YA thriller must read!" - Never Judge a Book a Cover, Blogger

"A gripping summer read perfect for the holidays" - Mini Travellers, blogger

"The best YA novel I've read in years. Beautiful, sad, sweet mystery, with just the right amount of redemption at the end." - Anthony McGowan, author of the Carnegie-shortlisted "Rook"

"A quick, tense read with an engaging mystery at its heart." - YA Under My Skin, Blogger