Showing 1 - 12 of 12 Results
1.
Dr. Crypton's Mindbenders by Crypton ISBN: 9780207146145
3.
Dr. Crypton's Mind Benders by Crypton ISBN: 9780312901820
4.
Mind Game by Museum of Science and Indus... ISBN: 9780914091288 List Price: $4.95
5.
Dr. Crypton and His Problems by Crypton ISBN: 9780312214777
6.
Visitors from the Red Planet and 76 Other Solve-Them-Yourself Mysteries by Crypton ISBN: 9780393028447 List Price: $16.95
7.
Timid Virgins Make Dull Company and Other Puzzles, Pitfalls and Paradoxes by Crypton, Hoffman, Paul ISBN: 9780140080438 List Price: $6.95