Brain-busting, mind-bending, hair-tearing fun from one of America's top puzzle makers 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...