Killer Sudoku: 500 Insanely Challenging Puzzles - Paperback

by Katherine Manning (Author), O'Mainnin Books (Author)

You don't need to be a math prodigy to enjoy an insane Sudoku puzzle! Broaden your skills, and have a blast with this comprehensive collection of Sudokus, including 500 insane challenges. A must-have for all Sudoku fans.