The reader must solve various number puzzles in order to keep the Mad Mathematician from destroying the universe.
- ISBN10 0744547547
- ISBN13 9780744547542
- Publish Date 11 September 1997 (first published 2 September 1996)
- Publish Status Out of Print
- Out of Print 4 December 2007
- Publish Country GB
- Imprint Walker Books Ltd
- Edition New edition
- Format Paperback
- Pages 32
- Language English