He has done it again. This is a hilarious recounting of the the history of the backpack with an unfortunate caveman named Roscoe. For the present day there is a backpack wearer who pulls off a successful volcano eruption concocted in his backpack just in time to win the science fair. It's done in a comic, graphic novel format. Perfect for reluctant readers. The book includes four hilarious backpack adventures. They don't see books like this everyday.