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

Even Mr. Bungles the teacher sometimes has a day when, no matter how hard he tries, everything seems to go wrong--including allowing the class hamster, Nibbles, to escape.

A boastful hamster with exceptional talent as an escape artist recounts his experiences chewing, wriggling, or squeezing his way out of various closed areas in his quest for the great Outside.

Sweetie Pie escapes the confines of her hamster cage--and a series of insufferable owners--to find a new home in the wild.

Humphrey, the pet hamster of Longfellow School's Room 26, learns that his classroom is full of secrets, the most important of which is that a student will be leaving soon.

After learning about Sherlock Holmes, Humphrey the classroom hamster follows clues to try and discover why Mrs. Brisbane is gone and Mr. E, a fun but not very educational substitute, is taking her place in Room 26 at Longfellow School.

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...

"Og the Frog tells the story of how he first came to Room 26, where he meets Humphrey the hamster, befriends the students, and writes poems and songs."--

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.

When second-grader Eugene and his family move to a new neighborhood and he starts at a new school, he has a chance to bring out his superhero alter ego, Captain Awesome, to find the kidnapped class hamster.