Sudoku Puzzle Book, 400 HARD Puzzles: Single Difficulty Level For No Wasted Puzzles (Sudoku Puzzle Books Series 2): Books, Sudoku Puzzle: 9781544657486: Amazon.com: Books
Sudoku Book 1,600 Puzzles, 800 Hard and 800 Extra Hard: Bargain Size Sudoku Puzzle Book With Two Levels of Difficulty To Improve Your Game (Sudoku Book Challenger Series): Book, Sudoku: 9781546743576: Amazon.com: Books
300 Easy to Medium Sudoku Puzzle Book: Volume 2: Carlson, Ashely: 9781540700162: Amazon.com: Books
Sudoku Large Print - Expert Level - N°7: 100 Expert Sudoku Puzzles – Puzzle Big Size (8.3"x8.3") and Large Print (36 points): Carton, Lani, com, LanicartBooks: 9781979090230: Amazon.com: Books
Hard Sudoku Puzzle Book Volume 2: Hard Sudoku Puzzles For Advanced Players: Forkes, Brad: 9781542916424: Amazon.com: Books
Very Hard Sudoku Puzzles Volume 1: Very Hard Sudoku Puzzles For Advanced Players: Cross, Simon: 9781541242432: Amazon.com: Books
Sudoku Book 800 Puzzles, 400 Medium and 400 Hard: Sudoku Puzzle Book With Two Levels of Difficulty To Improve Your Game (Sudoku Book Series): Book, Sudoku: 9781544185729: Amazon.com: Books
Sudoku Book 600 Medium Puzzles: Sudoku Puzzle Book With Only One Level of Difficulty (Sudoku Book Challenger Series): Book, Sudoku: 9781546450191: Amazon.com: Books
Sudoku Book 1,600 Puzzles, 400 Easy, 400 Medium, 400 Hard and 400 Extra Hard: Bargain Size Sudoku Puzzle Book With Four Levels of Difficulty To Improve Your Game (Sudoku Book Series 2): Book, Sudoku: 9781545525524: Amazon.com: Books
Squiggly Sudoku Book 1: Anthony Zouvelos Jr.: 9780997925005: Amazon.com: Books
Amazon.com: Sudoku 555 Puzzles Easy to Expert: Easy, Medium, Hard, Very Hard, and Expert Level Sudoku Puzzle Book For Adults (Puzzles & Games for Adults): 9781951791018: Nest, Game: Books
Medium Difficulty Sudoku Puzzles Volume 3: 200 Medium Sudoku Puzzles For Advanced Players: Boyd, Ashley: 9781542516853: Amazon.com: Books