Sudoku Puzzle Book Variations: Nine Different Challenging Sudoku Styles For Advanced Players (Variations Series): Master, Sudoku Puzzle: 9781086744910: Amazon.com: Books
Large 12x12 Killer Sudoku: Media, Clarity: 9781540768346: Amazon.com: Books
Large Print Sudoku 12x12 - 100 Hard Puzzles: Vey Difficult Sudoku Variant - Different Style of Sudoku Puzzle Book for Adults (Large Print Sudoku Variants): Hammond, Oliver: 9798702417677: Amazon.com: Books
Super Sudoku 12x12 - Medio - Volume 17 - 276 Puzzle (Italian Edition): Snels, Nick: 9781512071290: Amazon.com: Books