Hard As Nails Sudoku Bliss Hard As Nails Sudoku Bliss is an awe-inspiring book comprising 200 spectacular, really engaging Sudoku puzzles at a hard level of difficulty. It has the following great attributes. Contains 200 jaw-dropping 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 adventure, so you become enmeshed in solving the puzzles right away. A 9 x 9 square grid formation is used throughout the book, comprising 9 rows, 9 columns, and 9 inner boxes. 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. 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 engaged with solving the puzzles, you are not only having immersive fun and purposefully entertaining yourself, but you are also subtly assimilating spectacular life-building lessons as well as developing important pragmatic skills of deep thinking, problem-solving, planning, and strategy along the way. Buy this Hard As Nails Sudoku Bliss book. It promises you insane excitement and mind-blowing satisfaction. You will be very happy that you did.