Brian and his younger sister Penny become involved in a mystery at the science museum where they are working on a woolly mammoth display for a science fair.
- ISBN10 060609590X
- ISBN13 9780606095907
- Publish Date 1 January 1996 (first published 1 September 1995)
- Publish Status Out of Print
- Out of Print 3 March 2021
- Publish Country US
- Imprint Demco Media Inc
- Edition Turtleback School & Library ed.
- Format Hardcover
- Pages 87
- Language English