My first CalcuDoku book can now be purchased on Amazon! The book contains 200 puzzles ranging in sizes from 5×5 to 9×9. – 136 puzzles are with all operators, evenly split into the standard five difficulty levels: EASY-COOL-THINKER-BRAIN-IQ, but there are also a couple INSANE – 64 puzzles are with the (significantly) reduced number of [...]
Puzzle book for 2013!
10% discount in UK!
but wait! ALSO 10% discount on Amazon.com!
Sample Puzzles!
FREE Puzzles!
FREE Sudoku variants!
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