The World's 200 Hardest Brain Teasers: Mind-Boggling Puzzles, Problems, and Curious Questions to Sharpen Your Brain
Full Title: | The World's 200 Hardest Brain Teasers: Mind-Boggling Puzzles, Problems, and Curious Questions to Sharpen Your Brain |
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ISBN: | 1402238576 |
ISBN13: | 9781402238574 |
List Price: | USD $14.99 |
Authors: |
Gruber, Gary |