Very Hard Sudoku Jigsaw Killer Puzzle Book for Adults: 250 Very Hard Sudoku For Advanced Players Paperback $8.99
Medium Hidoku Puzzles 16x16 Book for Adults: 200 Medium Hidoku For Intermediate Players. One puzzle per page. Large print. Paperback $12.99
Medium Sudoku Killer Puzzles Book for Adults: 250 Medium Sudoku For Intermediate Players Paperback $8.99
Hard Hidoku Puzzles 6x6 and 7x7 Book for Beginners: 200 Hard Hidoku Puzzles for Adults Paperback $8.99