The Guardian Killer Sudoku 2

This book includes 210 never-before-seen killer Sudoku of a progressive level of difficulty, complete with an introduction and full solutions. It is guaranteed to provide hundred of hours of puzzling enjoyment.

210 more previously unpublished killer Sudoku puzzles.

Test your wits against 210 brand-new killer sudokus with this formidable collection of the world's favourite puzzle.

This compilation draws on all the knowledge of the expert puzzle writers at the Guardian, whose killer sudokus are enjoyed by hundreds of thousands of people every day. All of your logical reasoning will be required to solve these previously unpublished puzzles, specially designed to increase in difficulty as the book progresses.