Beware...It's...Killer Sudoku! - Michael O'Connell - Bog

A book of Killer Sudoku puzzles. You know regular sudoku, this is a very similar puzzle with a few changes. There are no pre-filled numbers, instead there are hints on the grid which help you to work out the answers. It can look intimidating but once you get started it will gradually come together. This is a challenging book of Killer Sudoku puzzles but it is not one of the hardest killer sudoku books. As brain teaser games go, this is a better than average one. While some clever kids might be able to solve the puzzles in this logic puzzle book it really consists of puzzle games for adults. This is one to try to see if you enjoy the challenge and if you do you can try harder ones. You're going to have a very good workout for your brain with this book of brain teasers for adults.