The eagerly-awaited seventh Book in the bestselling Times Difficult Su Doku series.
Since the first Su Doku puzzle appeared in The Times in November 2004, they have become a phenomenon, with over 5 million copies of The Times Su Doku books s.
You are guaranteed hours of absorbing, brain-stretching entertainment.
This is the latest collection of 200 previously unpublished Difficult Su Doku puzzles - perfect for the intermediate Su Doku solver in need of a constant supply of challenging puzzles.
The eagerly-awaited seventh Book in the bestselling Times Difficult Su Doku series