From your critically acclaimed author of Allegedly, Tiffany D. Jackson, comes a gripping fresh novel perfect for supporters of E. Lockhart and Gillian Flynn about the secret of one teenage girl’s disappearance as well as the traumatic ramifications of the truth.

Mon Charles is missing, and only Claudia seems to see. Claudia and Monday will always be inseparable-more sisters than friends. So when Mon doesn’t arrive for the first day of school, Claudia’s worried.

When she doesn’t present for the second day, or second week, Claudia knows that something is wrong. Monday wouldn’t just keep her to withstand exams and bullies by itself. Not after last year’s rumours rather than with her grades at risk. Now Claudia needs her best-and only-friend more than ever. But Monday’s mother refuses to give Claudia a straight reply, and Monday’s sister Apr is even less help.

As Claudia digs deeper into her friend’s disappearance, she discovers that no-one seems to remember the final time they saw Mon. How can a teenage lady just vanish without anyone noticing that she’s eliminated?