Killer Sudoku puzzles are a great way to keep your mind active and engaged, but it can be hard to find new puzzles that are challenging and interesting.
Most Sudoku puzzle books are the same, with the same puzzles. Once you've solved them all, there's not much left to do. Our Puzzle book is different. We've hand-selected 100 of the most challenging and interesting Killer Sudoku puzzles from around the internet for you to enjoy. With our variety of levels and difficulties, you'll never get bored again.