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Never before has such a huge collection of Sudoku puzzles been published in a single book. The Gigantic Sudoku Puzzle Book has 1500 sudoku puzzles spread across 6 levels of difficulty. All the puzzles are on a standard 81 square, 9X9 grid. The solutions to ALL1500 puzzles are included at the back of the book. The levels are: easy, average, challenging, tough, nail biting and torturous. Each level has around 250 puzzles which increase in difficulty as you turn each page. At the end of each level, I have included 6 empty grids for scribling and calculating. The easy puzzles will take a couple of minutes to complete. The average and challenging puzzles need a bit more brainpower, while the tough and nail biting will have you scratching your head and biting your pencil. As for the torturous ones - don't say I didn't warn you. You may need every trick in the book and possibly some divine inspiration to solve the toughest of these. The BUYSUDOKUBOOKS.COM Guarantee Often you find sudoku books with puzzles that have more than one solution. This can waste a lot of time and drain a fair amount of ones sanity when it comes to solving a puzzle. But have no fear, to ensure minimum frustration, every puzzle in this book has been carefully checked and is guaranteed to have only one solution.