The Case of the Back-to-School Burglar — Nancy Star

It's time for the back to school carnival, and the Calendar Club is getting busy getting Fruitvale Elementary School ready. Dotty, Casey, and Leon are in charge of sorting prizes for all of the games. But some of the prizes are missing! Magnifying glasses, beanbag dogs, and even some lollipops disappear.
School hasn't started yet, but the Calendar Club has some homework to do to solve this mystery. Can they uncover the back-to-school burglar and prevent a carnival disaster?