Hard Sudoku Books for Adults Volume 1
This puzzle book has only Sudoku puzzles in it. There is 1 puzzle per page, and the solutions are
in the back of the book. All of the puzzles are hard and utilize the numbers 1 through 16.
- 16x16 Sudoku puzzles
- 100 Puzzles
- 1 Puzzle per page
- Difficulty level: Hard