In his sixth adventure, Humphrey heads off for the great outdoors.

When Humphrey hears that school is ending, he panics. School ends? What's a classroom hamster to do if he's not in school? But as it turns out, there's something thrilling in store for Humphrey and Og the frog: going to Camp Happy Hollow with Ms. Mac and lots of the kids from Room 26! Camper Humphrey meets a friendly wild mouse, tracks down Og when he gets lost by the lake, and uses his wily charm to help kids adjust to cabin life and make new friends.

Everyone's favorite classroom pet keeps entertaining kids across the nation, and his books have won eight state awards and were nominated for fourteen others.