|aSurprises according to Humphrey |cBetty G. Birney.
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|aNew York |bPuffin Books|c2009.
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|a138 p. |c20 cm.
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|aAccording to Humphrey |v4
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|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.