522 Sudoku Puzzles for Adults: SUDOKU Puzzle Book: 522 SUDOKU Puzzles For Adults: Easy, Medium & Hard For Sudoku Lovers (Instructions & Solutions Included) - Vol 4 (Paperback)

This book contains 174 unique SUDUKO puzzles for each level of difficulty (easy, medium and hard) for a grand total of 522 puzzles (along with their solutions).

Specs:

• Instructions & solving techniques for beginners (included)
• Each puzzle has one unique solution (included at the end, so there are no distractions)
• Wide margins (easy to solve puzzles or even tear out the pages)
• Thick white paper and a durable paperback spine
• 8.5 x 11 inches (plenty of space)
• 6 puzzles per page
• 3 sections (easy, medium, hard)
• 29 pages of puzzles for each section with numbered pages (so you can swiftly locate each solution)