Sudoku X 15x15 - Hard to Extreme - Volume 9 - 276 Puzzles

Do you love to solve difficult Sudoku X 15x15 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 15x15 - Hard to Extreme is a collection of 276 puzzles:

• 108 hard Sudoku X 15x15 puzzles
• 108 extreme Sudoku X 15x15 puzzles
• 60 e...