Mind-Bending Hard Sudoku Collection Mind-Bending Hard Sudoku Collection is a greatly bewildering book consisting of 200 entrancing, perfectly mystifying Sudoku puzzles at a hard level of difficulty. It contains the following wonderful features. Contains 200 bewitching 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 wizards.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 irrelevant items are excluded from the book, and the puzzles are straight away presented for your enjoyment, so you become engaged in solving the puzzles right from the onset. A 9 x 9 square grid formation is used throughout the book, consisting of 9 rows, 9 columns, and 9 inner squares. As you probably know by now, assuming you are a Sudoku enthusiast, 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, and neither in an inner square. Given those constraints, there is only one correct solution to each puzzle. Just check towards the back of the book for all solutions, anytime you need to do so. This book is indeed a collector's item for all Sudoku pundits. While you are involved with solving the puzzles, you are not only having a amazing side-splitting encounter, and profitably engaging yourself, but you are also steadily imbibing spectacular life-building lessons as well as developing sensible, practical skills of deep thinking, problem-solving, planning, and strategy along the way. Buy this Mind-Bending Hard Sudoku Collection puzzle book. It assures you a super relaxation experience and is also a stunning brain teaser volume. You will be very satisfied you did.