Big Book of Su Doku 3A bumper collection of easy, medium, and difficult Su Doku puzzles to test your mental dexterity, powers of logic, and deduction. You will find 100 easy, 100 medium, and 100 hard puzzles in this latest collection so you can gauge your progression through the difficulty levels. Are you ready for the test? You will find the solutions at the back of the book. Big Book of Su Doku 3 is ideal for keeping your mind sharp and testing your powers of deductive