Workman Publishing Editors of Nikoli Publishing: Original Sudoku

Prepare to be obsessed. Match wits with the experts who created Sudoku. Arranged from “Easy” to “Very Hard;” here are over 300 logic puzzles that celebrate the compulsive joy of Sudoku with symmetry, smartness, and elegance—qualities lacking in computer-generated puzzles. It’s fiendish fun…every puzzle is designed by an author who anticipates your next step and obscurest the path, while never leading you into frustration. ...