Harold the hamster loves playing in his cage and, when his human friend, Harper, takes him out, in his ball.

When Harry, the class pet, gets out while at Amelia Bedelia's school break, Amelia and her friends must find him.

After finding a hamster that has been left behind in his taxi, a lonely immigrant cab driver celebrates Hanukkah with the little creature, while waiting to learn if the owner will return.

When Hamstersaurus Rex is wrongly blamed for destruction caused by Squirrel Kong in the school science lab, Sam Gibbs works to clear his friend's name before Hammie is sent to a home for troubled pets.

"It is Princess Harriet Hamsterbone to the rescue when Heady the hydra's egg is stolen, but her search leads her to a castle accessible only by a rat with a very long tail"--

Night 1 / My life is perfect. / I have a bowl full of seeds, a cozy pile of wood shavings, and room to run. / I'm never leaving here. / Question: Who's the luckiest hamster in the world? / Answer: ME! Seymour the hamster has the perfect life. He has a spacious cage, a constant food supply, and a FuzzyBoy 360 exercise wheel that lets him run to his heart's content.

"When a fairy godmouse forces Whiskerella to wear glass slippers and attend balls night after night in search of a happily ever after, it's up to Princess Harriet Hamsterbone to break the spell and save the day"--

Hot Rod Hamster enlists the help of his friend Dog to build a super sleek soap box racer for the Wacky Whatever Race.

Sam Waters desperately wants a pet. But his parents say that Sam must first prove he's responsible. So he takes an after-school job in a pet store called Little Shop of Hamsters. To his horror, Sam soon finds that cute, little hamsters can become very UNCUTE monsters. Suddenly, Sam isn't fighting for a pet--he's fighting to survive! Could the souvenir he got in HorrorLand have anything to do with this?

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.