Become a master in solving Outside Sudoku. After solving all the puzzles in this book, you will be a Outside Sudoku Pro. You start with easy Outside Sudoku puzzles and you gradually build your way up to extremely difficult Outside Sudoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Outside Sudoku - Easy to Extreme is a collection of 276 puzzles: The goal of Outside Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. Some digits are given outside the grid. These digits must appear in the first three cells in the corresponding direction. I guarantee that every logic puzzle in this Outside Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other English PuzzleBooks.net books.