CalcuDoku Book 1: Engage Your Brain – One Puzzle at a Time. 100 Puzzles to Train Your Mind - Challenging Logic Puzzles for Sharp Minds.

CalcuDoku Book 1: Engage Your Brain – One Puzzle at a Time. 100 Puzzles to Train Your Mind - Challenging Logic Puzzles for Sharp Minds.

Independently published

Pages: 116, Paperback, Independently published

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