In this third offering about Slippers the puppy, the appealing pooch slips into a backpack for an unauthorized visit to his young owner’s classroom. The little girl, Laura, doesn’t realize her puppy has joined her, and Slippers manages to explore the school and climb back into the bag for the ride home without Laura ever discovering her puppy’s presence. In a series of clever word plays, Slippers is noticed by one person and then just barely avoids detection by another. The storyline is simple (and sometimes a little stilted), but Bynum’s illustrations present an additional layer of warm humor, with an engaging cover illustration of Slippers with a pencil in his mouth, all ready for his big day at school. (Picture book. 4-6)