Go!Games The Sudoku Challenge: 240 Entertain Your Brain Puzzles

Take the Sudoku challenge if you dare! Featuring five levels of difficulty, from very easy puzzles to the very hard, these beautifully and logically constructed grids offer solvers just the right amount of a challenge, allowing them to stay focused and fully enjoy the experience. The creators, Sudoku master Anthony Immanuvel and puzzle guru Terry Stickels, know that if a puzzle becomes too stressful or frustrating, it's probably a flaw in the design--not the person doing it. Unlike lesser p...