The Toughest Sudoku Puzzle Book

Do you love to solve difficult Sudoku X 16x16 puzzles? Then you should solve the Sudoku X
puzzles in this book. You get to solve extremely difficult Sudoku X puzzles.
You do not need to wade through tons of easy Sudoku X puzzles before getting to the real brain teasers.
Once you pick up this book, you won't be able to put it back down. You have been warned!
Sudoku X 16x16 - Hard to Extreme is a collection of Over Than 100 Sudoku puzzles 16x16.
I guarantee that every logic puzzle in this Sudoku X book has been carefully checked to ensure
that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other English PuzzleBooks.
Sudoku X is also known as Diagonal Sudoku, Kokonotsu, Taikakusen Nanpure and Diagonal Line Number Place.
Sudoku is a fun and addicting logic puzzle game that has taken theworld by storm.
This book is ideal if you love to play Extreme Sudoku 16x16 but you want a much bigger challenge.
Take your Sudoku to the next level. Move up from the original 9x9 Sudoku grid to a larger (and harder) 16x16 grid.