Go! Sudoku is a competent package, but due to the pervasive nature of Sudoku these days, you probably don't need to spend any money to get puzzles like this.
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(indexed the 26/02/2008)
For those who don't know, sudoku is kind
of a crossword puzzle with numbers. With
puzzles taking less than 10 minutes apiece
...
Read this review
(indexed the 14/03/2008)