The document introduces the author and illustrator of the book "There's a Hamster in My Lunchbox", Susan Clymer and Paul Casale. It lists the main characters of the book as Squeaks the hamster, Elizabeth, Hillary, David, Micah, Squeaks Jr., Nora, Mr. Jenkins and Mystery Giver. It also lists the settings as school, Elizabeth's house, Nora's house and a carnival. It provides a brief overview of the problem in the book where Hillary opens Squeaks' cage and he wanders off, and the solution where the Janitor finds Squeaks in Elizabeth's lunchbox.