Sudoku Numbricks - 200 Hard to Master Puzzles 11x11 (Volume 41)
Sudoku Numbricks - 200 Hard to Master Puzzles 11x11, Volume 50 (Paperback) - Walmart.com
Sudoku Seethrough - 200 Hard to Master Puzzles 11x11 (Volume 10) by Dart Veider | 9781545171158 | Reviews, Description and More @ BetterWorldBooks.com
Sudoku Binary - 200 Easy to Normal Puzzles 11x11 (Volume 47): Veider, Dart: 9781703105414: Amazon.com: Books
400 Jigsaw Samurai and Sukrokuro. Hard Levels.: Gattai-5 Sudoku and Sukrokuro 11x11+12x12 Puzzles. Holmes Presents a Collection of Complex Classic Sud a book by Basford Holmes