Medium Difficulty Sudoku Puzzles Volume 3: 200 Medium Sudoku Puzzles For Advanced Players: Boyd, Ashley: 9781542516853: Amazon.com: Books
Perfect Sudoku :100 Medium Sudoku Puzzles with Answers - Compact 6"x9" Easy Carry: Puzzle book: Hewkin, Fabio: 9781540636133: Amazon.com: Books
Amazon.com: Sudoku Puzzles - Niagara store / Sudoku Puzzles / Puzzles: Toys & Games
Revenge of Killer Sudoku 4: 150 Of All New Puzzles (Revenge of Killer Sudoku Puzzle Books): Ape, DJ: 9781441400956: Amazon.com: Books
Revenge of Killer Sudoku (Revenge of Killer Sudoku Puzzle Books): Djape: 9781503231320: Amazon.com: Books
Sudoku Puzzle Book, 400 Puzzles, 200 MEDIUM and 200 HARD: Improve Your Game With This Two Level Book (Sudoku Puzzle Books Champion Series): Books, Sudoku Puzzle: 9781546770138: Amazon.com: Books
Random Easy To Very Hard Sudoku Puzzles: 200 Puzzles - Volume 1: Rose, Kellie: 9781541105058: Amazon.com: Books