Book 2 - After the holidays, Humphrey is shocked by a big surprise in Room 26-a new class pet! Humphrey tries to be welcoming, but Og the frog doesn’t respond to any of his friendly squeaks or visits (remember, he has a lock-that-doesn’t-lock). Plus, the students are so interested in Og, they almost stop paying attention to Humphrey altogether. Humphrey doesn’t like the mad-bad-sad feelings he’s had since Og came, but luckily he still gets to have adventures with different kids on the weekends.  Friendship can be tricky, but Humphrey is an intrepid problem-solver. If any hamster can become buddies with a frog, he can. 

Book 3 - Humphrey loves to solve problems for his classmates in Room 26, but he never meant to create one! Golden-Miranda, one of his favorite students, gets blamed when Humphrey is caught outside of his cage while she’s in charge. Since no one knows about his lock-that-doesn’t-lock, he can’t exactly squeak up to defend her. Humphrey really has his paws full when Don’t-Complain- Mandy-Payne and her family stir up more big trouble. Humphrey manages to help Pay-Attention-Art and Sit-Still-Seth and even survives a trip to the vet, but can he clear Miranda’s name without giving up his freedom forever!

Book 4 - A classroom hamster has to be ready for anything, but suddenly there are LOTS-LOTS-LOTS of big surprises in Humphrey’s world. Some are exciting, like a new hamster ball. But some are scary, like a run-in with a cat and a new janitor who might be from another planet. But even with all that’s going on, Humphrey finds time to help his classmates with their problems. But will Mrs. Brisbane’s unsqueakable surprise be too much for Humphrey to handle? 

Book 5 - The students in Room 26 are learning about boats and building their own for a race on Potter’s Pond. Humphrey the hamster loves dreaming about being a pirate and watching his friends build ships. But when he mistakenly ends up at sea on the day of the boat race, he finds himself in the middle of more adventure than he bargained for! Humphrey is back in this charming story of a hamster on the high seas of hilarity.