When summer arrives, Humphrey, the pet hamster of Longfellow School's Room 26, is surprised and pleased to learn that he will be going to Camp Happy Hollow.

Humphrey the hamster is puzzled when unfamiliar students fill Mrs. Brisbane's classroom at summer's end, but he soon learns that his friends from last year are fine and that the new class needs his special help.

"During a creative writing unit at Longfellow School, the students in Mrs. Brisbane's class practice using their imagination with their very own writing journals--and Humphrey finds out that writing from his imagination is harder than it looks"--

While continuing to help his classmates solve their problems, Humphrey, pet hamster of Longfellow School's Room 26, faces many surprises, like rolling in a hamster ball, a substitute janitor who might be an alien, and the possibility of Mrs. Brisbane retiring.

When three little hamsters are tired of being called cute, they work on disguises to become bigger and scarier.

When Molly volunteers to look after Sammy McHamsterhead, the class pet, for the weekend she has visions of training him to do tricks and becoming rich and famous--but when she leaves the cage open and Sammy escapes she realizes that she has to find him or confess her carelessness to her teacher, Mr. Rose.

The clever, puzzle-crazy Jigsaw Jones utilizes his top-secret detective journal and enlists the help of his ace partner, Mila, to track down a missing hamster.

"Harriet Hamsterbone sets out to reverse the curse on twelve mice princesses who are forced to dance all night, every night"--

"What a job for Stanley--he's building a house for his friend, Myrtle. He will need his digger and his bulldozer and his cement mixer. He will also need his friend, Charlie to help. But will they manage to build the whole house?"--Provided by publisher.

"The students of Room 26 are so excited for Longfellow School's big school fair! Pet hamster Humphrey is too--but will he be allowed to march in the parade with his classmates?"--