Solving Sudoku is a lot of fun and very easy to learn. This Sudoku Puzzle Book is a fun and exciting way to sharpen your thinking skills, exercise your mind and keep your brain healthy. It is a great way for adults, teens and seniors to spend hours of guaranteed fun. You will have guaranteed fun with this Sudoku book! Sudoku Puzzles For Adults: 100 Hard Sudoku Puzzles With Solutions. Keep yourself entertained for hours!! Over 100 Puzzles & Solutions, Hard Puzzles for Adults? Many hours of fun! Great gift for all new and "old" Sudoku fans! 126 pages 8.5 x 11 sized Paperback. Get this massive bargain bonanza of classic Sudoku puzzles of skilfully crafted and graded.