Hardcore Sudoku Puzzles: A Brain Workout Hardcore Sudoku Puzzles: A Brain Workout is a stunning book comprising 200 brilliant, really captivating Sudoku puzzles at a hard level of difficulty. It has the following great features. Contains 200 befuddling puzzles.Hard puzzles throughout.Unique puzzles, and which are found nowhere else.Answers for all the puzzles are included at the back section of the book.One great puzzle per page.The puzzles are designed by a Sudoku expert and for all Sudoku aficionados.Abundant page space for scribbling answers before entering them into the grids.Attractive cover page having a great picture. This departs from the stiff grid patterns already overused on the covers of some other Sudoku books.Nice interior design and attractive fonts.Sizable 8.5 inches x 11 inches page size.Cozy book having 251 pages.Great price.. All nonessentials are excluded from the book, and the puzzles are instantly presented for your excitement, so you become involved in solving the puzzles right away. A 9 x 9 square grid formation is used throughout the book. As you probably know by now, assuming you are a SUDOKU fan, this means you can enter any number from 1 to 9 into the empty boxes. No number should be repeated either in a row or in a column. Given those conditions, there is only one correct solution to each puzzle. Just check towards the back of book for all solutions, anytime you need to do so. This book is indeed a collector's item for all Sudoku experts. While you are occupied with solving the puzzles, you are not only having impressive fun and excitedly entertaining yourself, but you are also subtly imbibing breathtaking life-enhancing lessons as well as developing crucial sensible skills of deep thinking, problem-solving, planning, and strategy along the way. Buy this Hardcore Sudoku Puzzles: A Brain Workout book. It promises you wonderful delight and electrifying pleasure. You will be absolutely satisfied you did.