The imaginary antics of a hamster with a humongous appetite who grows to enormous size.

Katie Carew wishes she could be anyone but herself, and turns into a hamster.

Guinea pig Sasspants knows something is wrong with ninth-grader Viola, the new pet shop assistant, so when Mr. Venezi goes missing Sasspants and Hamisher put their private investigation skills to the test.

Lola the hamster is teased by her classmates after they learn that Lola's parents call her "babycake," "sweetie pie," and "fairy princess."

"Matt Hunter is expecting the latest sword-and-fantasy video game, but he's in for a disappointment when he receives a hamster for Christmas instead. A hamster called Snuffles. A hamster that dies, but somehow keeps going. A zombie hamster that has his eye on Matt"--

Max and Mo are tired of eating corn. Luckily the big ones--the kids--just went apple picking. Everyone knows you can make applesauce with apples, but is there anything else you can make with them?

When guinea pig Sasspants leaves Mr. Venezi's pet shop to live with Detective Nichols, and hamster-detective Hamisher retires, the case of the missing bookstore cat must be solved without their help.