101 Giant Sudoku 20x20 #1

Featuring 101 giant Sudoku 20x20 puzzles, sorted into order of increasing difficulty and printed on large, top-quality paper, this unique collection of puzzles is full of attractively-designed challenges from best-selling puzzle author Gareth Moore, author of many international books. Each puzzle can be solved by nothing more complex than simply scanning the 20 rows, 20 columns and 20 5x4 boxes, without having to make any pencil mark notes. Guessing is never needed, and there is a guaranteed unique solution. Visit www.PuzzleBooks.org for a full list of other titles in this series.