sudoku one-a-day Author:Puzzler Here is a great idea. Let Sudoku be your thought for the day. The object is simple: fit the digits 1-9 in every row, column and 3x3 box. Sudoku One-a-Day contains an entire year's worth of challenges. If you work through the book in sequence, the puzzles step up in difficulty over the course of a month. On the other hand, you can just as e... more »asily match the level of challenge to your mood. Whichever, do remember to record the date solved by every puzzle, and you will create a unique record of days when you were feeling smart!« less