Birney, Betty G. 
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Author:
Series:
World according to Humphrey volume 4.
Average Rating:
5 stars
Description:
While 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.
