Explained Sudoku Author : George Ho Publisher : Trafford Publishing Total Pages : 149 Release : 2007 ISBN 10 : 9781425137786 ISBN 13 : 1425137784 Language : EN, FR, DE, ES & NL GET BOOK Explained Sudoku Book Description: 'Explained SUDOKU' by Dr. George Ho: a book containing 30 hard or very hard SUDOKU puzzles with solutions fully explained, solved by a Uniform Method with many techniques clearly specified.