by Jeff O'Hare
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Mathmania
Puzzlemania Superchallenge
Best of Puzzlemania Mazes
Puzzlemania + Math = Mathmania
Puzzlemania
Highlights Puzzlemania
Kokuritsu Kokkai Toshokan shozō Meijiki ...
A Tangled Tale
Mathematical recreations and problems of...
The Game of Logic
O homem que calculava
Kalejdoskop matematyczny