Humphrey the hamster had a great summer break, but when he returns back to school in the fall, all of the students in Ms. Brisbane’s room are missing! Ms. Brisbane’s class is filled with strange students! Humphrey is determined to solve the mystery of what happened to the missing students. He sneaks out of his cage at night and explores the school looking for clues. While Humphrey discovers where his old classmates are, he also discovers the new classmates have specific needs that Humphrey can help with, and he learns that he loves his new classmates just as much as the others. This Humphrey book will surely be kids favorites!