Henry had only seen his friends, the Number People, in his dreams. Then, he discovered that they lived in the magical, secret world of Gum Swamp. What s more, they needed his help to save Gum Swamp from an evil menace. Henry s fight to save the numbers and their animal friends involves special powers, a bit of math, and a whole lot of courage. Henry and his friends use their imagination, teamwork, and strategy to save Gum Swamp. But will that be enough? A read-aloud book for ages 5-9.