WHEN 13-YEAR-OLD EMMA bumps into her old friend Abby on the bus one Saturday afternoon, she later realizes that she was the last person to see Abby before her mysterious disappearance. Amidst the media frenzy and everyone's struggle to come to terms with the possibility of Abby's death, Emma starts a terrifying journey of her very own, as she uncovers things that lead to a discovery even the police have not thought of. . . . From the acclaimed author of Child X comes a thrilling and memorable novel for readers of all abilities.Praise for Child X: "It is compelling, heartfelt, and sadly, totally believable. British slang will not deter the reader from racing through this gripping tale."--VOYA, StarredFrom the Hardcover edition.