THEY WON'T FORGIVE. THEY WON'T FORGET.'Clever and wonderfully chilling. It held me hostage' - Fiona Barton, Sunday Times-bestselling author of The Widow and The Child'A brilliant page-turner' Jenny Quintana, author of The Missing Girl 1950 - At the crumbling Idlewild Hall school for unwanted girls, four room-mates begin to bond over dark secrets and whispered fears - until one of them mysteriou...