Never before has such a huge collection of Sudoku puzzles been published in a single book (except for Volume 1: -). The Gigantic Sudoku Puzzle Book Volume 2 has 1500 Sudoku Puzzles spread across 6 levels of difficulty. All the puzzles have between 17-28 clues on a standard 9X9 grid. Lookout for select puzzles with secret codes. You can use these secret codes to get free puzzles and other specials from our website. The levels are: easy, average, challenging, tough, nail biting and torturous. Each level has about 250 puzzles that increase in difficulty as you turn each page. At the end of each level, I have included 2 empty grids for scribbling and calculating. The easy puzzles will take a couple of minutes to complete. They are so easy that we haven't even included the solutions in the book (you can email solutions@sudokids and we'll send them to you). 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 puzzles. 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.