This book of 200 Hard Killer Sudoku Puzzles will grab onto your attention and then hold onto it for hours upon hours. Challenging and fun, these are brain games that will get you thinking and get you working, testing your abilities and demanding that you see puzzles in a wholly new light. Forget about those second-rate, barely half-challenging puzzles: these are Sudoku puzzles that are going to have you questioning your own skill level. If you are ready to see what you are really made of, this is the book for you! Flip to the first page if you dare and start working ñ they are not getting any easier. Solutions at the end of the book!