By Adam Rex, Author & Illustrator. On Account of the Gum is a book about how the best intentions lead to some of the worst (and funniest) ideas! Serious humor abounds in this story about one kid's hilarious misadventures with gum, and the cumulative buildup of stuff stuck in hair. From the madcap mind of Adam Rex comes a book about the improbable, downright bizarre remedies for a problem kids have faced since the creation of gum. For ages 5 and up.