If you enjoy giant Sudoku puzzles then this is the book for you Printed in large page format on high-quality paper, this book is packed with 50 enormous 25x25 Sudoku puzzles. Each puzzle is attractively presented in a range of symmetric patterns, and is guaranteed to be human-solvable - you can complete every Sudoku in the book just by scanning rows, columns and boxes, without having to make any pencil mark notes. Visit www.SudokuXtra.com for more details.