When summer arrives, Humphrey, the pet hamster of Longfellow School's Room 26, is surprised and pleased to learn that he will be going to Camp Happy Hollow.
- ISBN10 0606153543
- ISBN13 9780606153546
- Publish Date 14 April 2011 (first published 4 February 2010)
- Publish Status Out of Stock
- Publish Country US
- Imprint Turtleback Books
- Edition Bound for Schools & Libraries ed.
- Format Hardcover (Library Binding)
- Pages 184
- Language English