Outside Sudoku - Hard - Volume 4 - 276 Puzzles

Outside Sudoku is a fun and addicting logic puzzle game. This book is ideal if you love to solve difficult Outside Sudoku puzzles. You do not need to wade through tons of easy Outside Sudoku 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!

Outside Sudoku - Hard is a collection of 276 puzzles:

• 216 hard Outside Sudoku puzzles
• 60 extra logic puzzles

I guarantee that every logic puzzle in this Outside Sudo...