The Times Su Doku Book 3 : 100 challenging puzzles from The Times

Su Doku ‘the crossword without words’ comes with a health warning : it is seriously addictive. Here is a third collection of 100 previously unpublished puzzles for those in need of a fix.

Four levels of difficulty with more difficult and fiendish than easy and mild puzzles. You don’t need to be a mathematical genius to solve these puzzles; it is simply a question of logic.

The Times Su Doku is the original and best. Each puzzle leads by logic to a unique solution so that no guessing is necessary.