The Must Have 2015 Sudoku Puzzle Book: 365 puzzle daily sudoku to challenge you every day of the year. 365 Sudoku Puzzles - 5 difficulty levels (easy to hard)

by Jonathan Bloom Paperback details (United States). ISBN: 978-0-9870039-9-7 ISBN-10: 0-9870039-9-2 Buysudokubooks.com · 2014