Do you think you're an expert at puzzles? Does your brain work in the right way to solve the things that others find impossible? Do you believe you could solve the hardest puzzles known to man? If you do, then this book, the World's Hardest Sudoku Book, is just for you. With 200 of the hardest Sudoku puzzles ever created, this is designed for experienced puzzlers who are looking for a real challenge. Something which goes way beyond what you will find in regular Sudoku books. Exercise your brain. Find the answers. Never give in. Solve them all and you truly will be a professional puzzler. Frustrating, exasperating and maddening at times, above all the completion of these Sudoku puzzles will ultimately leave you satisfied. Until you want more of the same.