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Guinea Pigs Add Up Walker & Company, a division of Bloomsbury Publishing, Inc., 2010 Ill. by Tracey Campbell Pearson  (Hardcover ISBN: 978-0-8027-9795-7) Mr. Gilbert brings a guinea pig to school as a class pet, but it looks so lonely, he then brings another, and before long the class is getting an unexpected lesson in addition – and a very big cage. |
