Mega Sudoku Puzzles -400 Easy to Expert 16x16 vol. 8 (Paperback) | Greenlight Bookstore
Large Print Sudoku 16x16 - 100 Hard Puzzles: Very Difficult Hexadoku with Solutions - Sudoku Variant Puzzle Book for Adults (Large Print / Paperback) | Murder By The Book
Mega Sudoku 16x16 Large Print - Extreme - Volume 60 - 276 Logic Puzzles: Snels, Nick: 9781505649925: Amazon.com: Books