SlocumPuzzles.com
Title
SlocumPuzzles.com - The 15 Puzzle Book
Description
Excerpted from the website:
- This book contains the definitive, illustrated history of one of the most popular and important mechanical puzzles of all time. It can be argued that the Fifteen Puzzle (aka. the Gem, Boss, Crack Brain, 14-15 Puzzle, 15-14 Puzzle, etc. Puzzle), had the greatest impact on American and European society of any mechanical puzzle the world has ever known.