"Jacksons characters and their heart-wrenching story linger long after the final page, urging readers to advocate for those who are disenfranchised and forgotten by society and the system." (Publishers Weekly, "An Anti-Racist Children''s and YA Reading List")From the critically acclaimed author of Allegedly, Tiffany D. Jackson, comes a gripping novel about the mystery of one teenage girls disappearance and the traumatic effects of the truth.Monday Charles is missing, and only Claudia seems to notice. Claudia and Monday have always been inseparablemore sisters than friends. So when Monday doesnt turn up for the first day of school, Claudias worried.When she doesnt show for the second day, or second week, Claudia knows that something is wrong. Monday wouldnt just leave her to endure tests and bullies alone. Not after last years rumors and not with her grades on the line. Now Claudia needs her bestand onlyfriend more than ever. But Mondays mother refuses to give Claudia a straight answer, and Mondays sister April is even less help.As Claudia digs deeper into her friends disappearance, she discovers that no one seems to remember the last time they saw Monday. How can a teenage girl just vanish without anyone noticing that shes gone?