The Big Book of Sudoku: 500 Puzzles (Big Book of 500 Puzzles)

The Big Book of Sudoku

Sudoku (Ultimate Spiral Puzzles)

Brain Games® Sudoku (Brain Games (Unnumbered))

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The Must Have 2016 Sudoku Puzzle Book: 366 puzzle daily sudoku book for the leap year. A challenge for every day of the year. 366 Sudoku Games - 5 levels of difficulty (easy to hard)

Sudoku 2: Medium to Hard

Sudoku Vol. 2 Puzzle Pad: Easy to Medium

Sudoku: 400+ Sudoku Puzzles (Easy, Medium, Hard, Very Hard) (Sudoku Puzzle Book) (Volume 1)

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)

Sudoku: Easy to Medium