![Sudoku puzzle book on page 70](https://www.free-sudoku-puzzles.com/wp/wp-content/uploads/2018/05/sudoku_puzzles_book_-30-326x245.jpg)
Archive Puzzles – 12 Hard Sudoku Puzzles – Books 11 to 20
Printable Sudoku Puzzles Hard sudoku puzzles are a great deal more difficult and are suggested for seasoned sudoku players. These sudoku puzzles will have less digits already entered. 12 Hard Sudoku Puzzles – Book 11 […]