Get your brain active with this Active Brain Series 2 book containing 400 medium gigantic sized puzzles. 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. With only one level of difficulty there are no wasted puzzles. 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"