کتاب های George J. Summers
The Great Book Of Mind Teasers & Mind Puzzlers
George J. Summers, 1986
The Great Book of Puzzles and Teasers
George J. Summers, 2005
Mind Bafflers
George J. Summers, 2006
Mind Bafflers
George J. Summers, 1997
Test Your Logic
George J. Summers, 1972
Test Your Logic
George J. Summers, 1972
Great Book of Classical Puzzles
George J. Summers, 2006
