Su Doku Silver
HarperCollins Publishers Limited, Sep 1, 2008 - 240 pages
The original creator of The Times puzzles, Wayne Gould is the leading authority on Su Doku and is the man responsible for transforming this Japanese number puzzle into a worldwide phenomenon. Gould's success has resulted in being listed as one of Time magazine's most influential people in 2005.
Containing 150 previously unpublished puzzles, Su Doku Silver follows on from Su Doku Bronze and is the second of four collections designed to exercise the brain and test your logic.