Humphrey is unsqueakably excited—a special guest is coming to Room 26! But when he sees who it is, he’s SHOCKED-SHOCKED-SHOCKED. The guest is a big dog! And Mrs. Brisbane doesn’t seem worried at all! Luckily, this dog is very gentle. His name is Happy, and he’s come to help Humphrey’s classmates with their reading. Then they hear about more dogs—a friendly one who can do tricks and sing, and a beloved pet who has gone missing. Of course everyone wants to help find her. Good thing Humphrey is so good at helping kids solve their problems. And he pawsitively loves to solve a mystery—even one involving a dog! With a fresh voice and an engaging hamster’s-eye view of school, families, and treats to hide in a cheek pouch, Betty G. Birney’s Humphrey will elicit laughter and a new appreciation for classroom hamsters everywhere.