Brian and his younger sister Penny try to catch the culprit who has been sabotaging School Spirit Week.
- ISBN10 0613013387
- ISBN13 9780613013383
- Publish Date 30 September 1995 (first published 1 May 1994)
- Publish Status Out of Print
- Out of Print 6 April 2021
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Language English