George J. Summers
Popular items by George J. Summers
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Logical Deduction Puzzles (Official Mensa Puzzle Book)
Summers, George J.
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The Great Book of Mind Teasers & Mind Puzzlers
Summers, George J.
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Brain Teasers (pocket puzzlers)
Etc Martin Gardner
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Test Your Logic (Dover Recreational Math)
Summers, George J.
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New Puzzles in Logical Deduction
Summers, George J.
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