The Original Sudoku Book 3 is puzzler-friendly, with an insider's introduction to the art of Sudoku solving and of course, a complete answer key. The Original Sudoku Book 3 features: 320 puzzles (more than any other Sudoku book!) ranging from Easy to Very Difficult; a complete how to section on creating your own Sudoku puzzles; and tips, sample games, and an insider's tutorial to help every newbie get up to speed and strengthen the abilities of the most experienced player.