When you buy this book you get an electronic version (PDF file) of the interior of this book. Non-Consecutive Sudoku is played in the same way as Sudoku except that no two adjacent cells have consecutive values. This book is ideal if you love to solve difficult Non-Consecutive Sudoku puzzles. You do not need to wade through tons of easy Non-Consecutive Sudoku puzzles before getting to the real brain teasers. Once you pick up this book, you won't be able to put it back down. You have been warned! Non-Consecutive Sudoku - Hard is a collection of 276 puzzles: 216 hard Non-Consecutive Sudoku puzzles 60 extra logic puzzles The goal of Non-Consecutive Sudoku is to fill in the empty cells, so that each column, row, and region contains each number exactly once. Furthermore, no two adjacent cells have consecutive values. For example, if a cell contains 3, then any neighboring square cannot contain either 2 or 4. I guarantee that every logic puzzle in this Non-Consecutive 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.