Sudoku 200 Giant Size Puzzles, 100 Hard and 100 Extra Hard, to Keep Your Brain Active for Hours

Get your brain active with this Active Brain Series 2 book containing 200 gigantic sized puzzles, 100 hard and 100 extra hard, two different levels of difficulty to help increase your ability. Each huge puzzle fills the whole letter size page leaving plenty of space for penciling in the possibilities. Just one puzzle per page and solutions at the end of the book. Sudoku is a fun way to exercise your brain and there are plenty of puzzles in this book to give it a really good workout! 8.5" X 11"