Sudoku Extra Hard: Sudoku Diabolical, Hard Sudoku Books for Adults, Sudoku Gift Book, Sudoku Expert, Gift for Math Geeks, (Paperback)

Expert, Diabolical, Extremely Hard - you name it. The main point is - this Sudoku Puzzle Book is not for a beginner.
Features:
- instructions (just in case)
- 8.5 x 11 inches
- 110 pages
- 2 puzzles per page
- solutions
- white paper
- softcover
If you are ready for this challenge, don't hesitate and order a copy today!