Welcome to Sudoku, Stickels-style! Featuring five levels of difficulty, from very easy to very hard, these beautifully and logically constructed grids offer solvers just the right amount of challenge, allowing them to stay focused and fully enjoy the experience. Stickels knows that if a Sudoku becomes too stressful or frustrating, it's probably a flaw in the design--not the person doing it. Unlike lesser puzzles, his never have more than one possible answer, are pleasing to the eye, and involve no guesswork. They're a great way to keep the mind in tip-top shape!