The big book of 12 × 12 Giant Sudoku: 400 12 × 12 Sudoku Puzzles

This is a book of 400 Giant 12 12 Sudoku puzzles. These puzzles work in exactly the same way as traditional Sudoku puzzles, but a little bit bigger to offer a little bit more challenge. Each row, column and region must contain the numbers 1-9, but they must also contain one each of the letters A, B and C. You can still use exactly the same techniques to solve these puzzles, but they will take you a little longer There are 400 puzzles altogether, split up as follows.

• 100 Easy puzzles. Ideal to get started.
• 100 Medium puzzles. For you to move on to once you start feeling more confident.
• 100 Hard puzzles. Getting harder
• 100 Tough puzzles. For the diehard Sudoku fans.

Something for everyone