The Guardian Sudoku 2 : A collection of more than 200 tricky puzzles

Dive into this challenging collection of the world's favourite puzzle, with 210 brand-new sudokus to savour. The Guardian's sudoku puzzles are enjoyed by hundreds of thousands of people every day and are now available in this carefully curated compilation.These previously unpublished puzzles increase in difficulty as the book progresses, so will test everyone from a sudoku novice to a seasoned expert.