The Virgin Book of Killer Sudoku

If you thought Sudoku was difficult, wait until you try Killer Sudoku! With five difficulty ratings, from 'very easy' to 'deadly', the 100 brand new Killer Sudoku puzzles in this book will provide a challenge to the most ardent Sudoku addict. If you thought Sudoku was difficult, wait until you try Killer Sudoku! With five difficulty ratings, from 'very easy' to 'deadly', the 100 brand new Killer Sudoku puzzles in this book will provide a challenge to the most ardent Sudoku addict.