Killer Sudoku: Killer Sudoku, Book 1: 200 Mind-bending Puzzles (Paperback)

Mind-bending Killer Sudoku puzzles. Killer Sudoku - the even more challenging and addictive version of the popular 9x9 puzzle. As well as each row, column and 3x3 box containing every number from 1-9, each cage of cells must add up to the total provided. Can you puzzle it out? With 200 puzzles ranging from 1 star for starter geniuses to 5 stars for world-class puzzlers, this book is not for the faint-hearted and will provide many, many hours of head-scratching entertainment.