Cam Jansen and the School Play Mystery

Cam's best friend, Eric, is starring as Honest Abe Lincoln in the school play. But when all of the money raised from ticket sales mysteriously disappears, it seems that someone is lurking around who is far from honest. Cam's teacher, Ms. Benson, calls the police, and Cam rushes to help. Can Cam, with a click of her photographic memory, find the missing money before the thief makes a getaway?