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.

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

Humphrey, pet hamster at Longfellow School, learns that he has an important role to play in helping his classmates and teacher.

Humphrey the hamster and the students in Mrs. Brisbane's class get ready for the holidays and a special Winter Wonderland program.

When the Willows move into a new house, Celia, the youngest of four children, traps an enchanted hamster, who reluctantly agrees to grant the children one wish in exchange for his freedom.

Humphrey, the pet hamster of Longfellow School's Room 26, relates the ups and downs experienced by his human classmates as they begin a project to create a model town complete with houses and community services.

Leo's new pet hamster escapes from its cage before Leo has even decided on a name.

A boy's hamster leads an increasingly large group of hamsters on a tour of the boy's house, while his father counts down the minutes to bedtime.

Doc takes her hamster, Coleslaw, to the veterinarian, who checks his ears, eyes, and heartbeat, and treats his cold.