One Hundred Free Calcudoku Puzzles

This free book has everything to get you started doing Calcudoku's: 100 puzzles, ranging from very easy to quite difficult. The puzzles range in size from 3x3 to 9x9. The first 40 puzzles are relatively easy, the next 40 are of medium difficulty, and the final 20 are difficult. If you're not familiar with the rules of Calcudoku, then go to www.calcudoku.org and try some of the puzzles there. You can even score points by submitting solutions of the puzzles in this book!