Sent to Camp Happy Harmony to learn how to get along with each other, pairs of brothers and sisters chronicle in letters home how they come to suspect the intentions of the singing family running the camp.
- ISBN10 0613285522
- ISBN13 9780613285520
- Publish Date 5 April 2000 (first published 8 June 1999)
- Publish Status Out of Print
- Out of Print 6 April 2021
- Publish Country US
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Pages 178
- Language English