501 Sudoku Puzzles for Advanced Solvers! Vol. 1 In this book, you can find sudoku puzzles that are truly challenging and fun. Rather than offering a weak challenge that can easily be solved in a few minutes, you will enjoy analyzing and decrypting your way through each step of these puzzles until each number is in the right place. When you finally do solve a puzzle, you will find that you feel more accomplished and satisfied than with any of the previous sudoku puzzles you have tried-because the greater the challenge, the greater the reward. Whether you are looking for a way to train your brain and heighten its abilities so that you can do better in school, at work, or as you age; or wanting a way to relax after a stressful day, with a puzzle to focus your mind and get your thoughts off of the chaos in the world and your personal life, you will find that you can get that and more with the puzzles in this book. With over five hundred sudoku puzzles to choose from, you have limitless fun at your fingertips. In This Book You Will Find The interesting history of sudoku across the globe. The wonderful benefits of regularly enjoying sudoku. 250 Very hard sudoku puzzles 250 Insanely hard sudoku puzzles 1 Inhumanely hard sudoku puzzle And more... Puzzles have been a favorite past-time across the globe and throughout human history, and for a good reason. Now, with this book, you can take these puzzles with you anywhere. Whether you have an hour to sit down and relax or only a five-minute break, you can enjoy the pleasure that comes with working toward the correct answer. There's no reason to wait, buy now for endless fun!