When Humphrey the hamster returns to Mrs. Brisbane's class after the winter break, a new class pet and some other surprises give him an opportunity to reflect on the meaning of friendship.

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

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.

Humphrey the hamster and the students in Mrs. Brisbane's class get ready for the holidays and a special Winter Wonderland program. Includes Humphrey's tips for giving gifts after the story.

Mysteries according to Humphrey (Book 8): Mrs. Brisbane is missing! She just didn't show up in Room 26 one morning. The class has a substitute teacher, called Mr. E., but he's no Mrs. Brisbane. Humphrey has just learned about Sherlock Holmes, so he vows to be just as smart about collecting clues and following leads to solve the mystery of Mrs. Brisbane. Winter according to Humphrey (Book 9): The holidays are coming and Humphrey is unsqueakably excited....

"To Humphrey and the students at Longfellow School, spring seems impossibly late this year. Fortunately, planning a school Family Fun Night keeps the students (and classroom pets) busy as they look for signs of the changing seasons"--