Title: THE FUN & EASY SUDOKU BOOK: VOLUME 1:, Author: Resilient Strong
Title: The Biggest, Bestest Book of Sudoku, Author: Nikoli Publishing
Title: Sudoku: Puzzle Book for Adults and Teenagers, Author: Robert O. Brien
Title: Sudoku Puzzle Book for Adults: Extra Large Print, Author: Robert O. Brien
Title: Sudoku Medium Book for Adults Vol 1: Extra Large Print, Author: Robert O. Brien
Title: Sudoku Hard Book for Adults Vol 1: Extra Large Print, Author: Robert O. Brien
Title: Mixed Activity Puzzles for Adults Volume 2: Education resources by Bounce Learning Kids, Author: Christopher Morgan
Title: Massive Book of Mensa® Puzzles: 400 Mind Games!-A Colossal Collection to Stimulate Your Brain!, Author: David Millar