ISBN 0452287979 books & textbook
Sudoku Master Class: 144 Devilish Puzzles with Advanced Strategies
Penguin Publishing Group /2006-09-07 Paperback / 256 Pages
isbn-10: 0452287979 / isbn-13: 9780452287976
Penguin Publishing Group /2006-09-07 Paperback / 256 Pages
isbn-10: 0452287979 / isbn-13: 9780452287976