Outstanding Lateral Thinking Puzzles by Paul Sloane
$6.95
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Lateral Thinking: Creativity Step by Step (Perennial Library) by Edward De Bono
$10.20
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Thinkertoys: A Handbook of Creative-Thinking Techniques (2nd Edition) by Michael Michalko
$13.57
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Cunning Lateral Thinking Puzzles (Puzzle) by Paul Sloane
$6.95
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Six Thinking Hats by Edward de Bono
$10.19
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