Sudoku Puzzle Book: The Ultimate Sudoku Challenge - 1000 Puzzles (Vol. 1)
Sudoku: 400+ Sudoku Puzzles (Easy, Medium, Hard, Very Hard) (Sudoku Puzzle Book) (Volume 1)
Funster Tons of Sudoku 1,000+ Easy to Hard Puzzles: A bargain bonanza for Sudoku lovers
The Largest Sudoku Book in the History of the Universe: 2000 Puzzles with 5 Difficulty Levels
The Must Have 2017 Sudoku Puzzle Book: 365 daily sudoku puzzle book for 2017 sudoku. Sudoku puzzles for every day of the year. 365 Sudoku Games - 5 levels of difficulty (easy to hard)
Will Shortz Presents The Huge Book of Hard Sudoku: 300 Challenging Puzzles
Will Shortz Presents Surrender to Sudoku: 200 Irresistibly Hard Puzzles
The Big Book Of Sudoku (500 Puzzles)
Beyond Black Belt Sudoku: If you have to ask, it's too hard for you. (Martial Arts Puzzles Series)
The Big Book of Sudoku