100 medium hard large print Sudoku puzzles for adults, kids, and senior kids of all ages and abilities. It is well known that keeping your brain active can benefit people of all ages. Besides being fun and challenging the more puzzles you work the better you become. These puzzles are a step-up from the easy puzzles found in my first Sudoku puzzle book. Since there is no "grading system" for sudoku puzzles you might grade these puzzles as easy or hard. It really depends on your experience with solving these puzzles. All answers are displayed at the end of the book. So if you get stuck you can always find the solution in the back. Once you have worked out several puzzles you may want to try the more complex puzzles. In no time you will be an expert. This book contains 100 puzzles and instructions with the solved puzzle answers in the back.