Sarah Epstein‘s debut YA thriller has a strong first half that teases a supernatural explanation for Tash‘s memories of Sparrow and what happened to Mallory but Tash‘s claustrophobia read as a gimmick to me and I thought the plot got a little silly once Tash starts getting the answers she wanted. That said, Tash‘s relationship with her mum is well drawn and Epstein gives her a strong narrative voice so I‘d definitely read Epstein‘s next book.