Sudoku For Geniuses BOOK 3: For The Sudoku Lover These Are Brand New Extremely Difficult Sudoku Puzzles. Warning Very Difficult: Masters, The Sudoku: 9781653499083: Amazon.com: Books
Large Print SUDOKU Puzzle Book 3: 100 Hard Puzzles (Large Print SUDOKU Books) (Volume 3): Quinlan, Kenneth, Publishing, WMC: 9781523814336: Amazon.com: Books
Amazon.com: 3 in 1 Word Search, Crossword & Sudoku (3 Puzzle Books in One) 192 Pages : Toys & Games