Sudoku Hidoku - 200 Easy to Medium Puzzles 11x11 (Volume 5) by Dart Veider, Paperback | Barnes & Noble®
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