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.

Publisher Annotation: Things are calm at last in Maple Bluffs. The evil manufacturer SmilesCorp is out of business, Hammie Rex is a new dad to three tiny mutant offspring (Stompy, Chompy, and Hatshepsut), and Sam Gibbs feels that he can resume normal life. But soon enough, things get weird. When Sam visits a toy store to buy Beefer a bar mitzvah gift, one of the toys comes alive and attacks Hammie and the babies! Who could be behind this latest diabolical...

Publisher Annotation: Mysterious hauntings are causing major trouble at Horace Hotwater Middle School. Sam Gibbs and his super-strong tiny buddy, Hammie Rex, keep encountering creepy abnormal objects, including a floating sports jersey and a runaway go-kart. While Sam doesn't believe in ghosts, he has to admit the hauntings are getting weirder?and more dangerous. Could bizarre mutant animals be the cause? At Horace Hotwater, they often are! Beware...

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 classroom hamster has adventures going to the library, learning about the ocean, and sailing across a pond on a sailboat.

Sam Gibbs and Hamstersaurus Rex must prove that a giant squirrel living in the woods has been vandalizing their school.

"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"--

"Og the frog goes to summer camp with his best pal Humphrey, and has an exciting adventure in the wild"--