Classic Brain Twisters
 
Classic Brain Twisters
by Derrick Niederman, Jaime Poniachik, Tim Sole, Lea Poniachik, Rod Marshall
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Mind-stretching Math Puzzles
 
Mind-stretching Math Puzzles
by Derrick Niederman
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at 7 Sellers
The Secret Clubhouse Game Book
 
The Secret Clubhouse Game Book
by Mike Artell, Bob Longe, Glen Vecchione, Derrick Niederman
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at 5 Sellers