Sudoku Puzzle Book Volume 2: 200 Puzzles
Sudoku Puzzle Book Volume 1: 200 Puzzles
Sudoku Puzzle Book Volume 4: 200 Puzzles
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)
The Big Book of Sudoku