Sudoku Variants Puzzle Books Hard - Volume 1: Sudoku Variations Puzzle Books - Brain Games For Adults Paperback $9.99
Extra Large Print Sudoku Variations Puzzle Books Medium: Sudoku X, Sudoku Hyper, Sudoku Twins, Sudoku Triathlon A, Sudoku Triathlon B, Sudoku Marathon Paperback (Large Print) $9.99
480++ Easy Sudoku: Easy Sudoku Puzzle Books for Adults Level 1 - Perfect for Beginners - Large Print Puzzles - Easy Sudoku For Senior Paperback $7.99
Sudoku Puzzle Book 400 EXTRA HARD Giant Size Puzzles: One Gigantic Large Print Puzzle Per Letter Size Page Paperback $16.99
Puzzle Book for Adults: Sudoku, Killer Sudoku and More: 100 Sudoku and Sudoku Variant Puzzles Paperback $5.45
Sudoku Variants Puzzle Books Medium to Hard - Volume 2: Sudoku Variations Puzzle Books - Brain Games For Adults Paperback $10.99
Hard Sudoku Books for Adults 400 Sudoku Puzzles for Evil Geniuses: Sudoku Puzzle Books for Adults with Hard Puzzles Paperback $6.97