The fifth unputdownable mystery in the thrilling and bestselling SCARLET AND IVY series, perfect for fans of MURDER MOST UNLADYLIKE, SINCLAIR'S MYSTERIES and THE SCHOOL FOR GOOD AND EVIL.There's a new girl at Rookwood School, and a new mystery to solve.It's the start of term for Scarlet and Ivy, and the girls are intrigued by a fascinating new girl, Ebony. She's as enchanting as she is mysterious, and quickly, most of the younger girls appear to be under her spell.But rumours swirl like ghosts around Ebony, and not all of them are friendly. And when a prank on All Hallow's Eve goes horribly wrong, it's Ebony who gets the blame.Scarlet and Ivy aren't so sure. There might be more to Ebony than meets the eye, but surely she's not dangerous? And if Ebony isn't behind the prank, then who - or what - is to blame?