Mega Hard Sudoku MarathonMega Hard Sudoku Marathon is a remarkable book comprising 200 incredible, really enticing Sudoku puzzles at a hard level of difficulty. It has the following fantastic features.Contains 200 slick 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 pundits.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 pleasure, so you become engrossed in solving the puzzles right away. A 9 x 9 square grid formation, comprising of 9 rows, 9 columns, and 9 inner boxes, 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, and neither in an inner box as well. Given those conditions, 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 experts. While you are involved with solving the puzzles, you are not only having superb fun and gladly entertaining yourself, but you are also steadily assimilating spectacular life-building lessons as well as developing helpful, sensible skills of deep thinking, problem-solving, planning, and strategy along the way. Buy this Mega Hard Sudoku Marathon book. It assures you marvelous delight and great satisfaction. You will be very happy you did.