Sudoku Vol.3 Puzzle Pad: Hard - 200 Puzzles: Hard to Extreme (Other Printed Item)
Chronicle Books
ISBN: 9781452101743
Publication date: 01 Sep 2011
Author: Chronicle Books
Perfect for sharpening concentration and reasoning skills, here are 200 all-new Sudoku puzzles that build in difficulty level from hard to very challenging. A musthave for every on-the-go Sudoku sleuth!