|aSurprises according to Humphrey |cBetty G. Birney.
|aNew York |bPuffin Books|c2009.
|a138 p. |c20 cm.
|aAccording to Humphrey |v4
|aWhile continuing to help his classmates solve their problems, Humphrey, pet hamster of Longfellow School's Room 26, faces many surprises, like rolling in a hamster ball, a substitute janitor who might be an alien, and the possibility of Mrs. Brisbane retiring.