Futoshiki is a fun and addicting logic puzzle game that combines Sudoku with inequality constraints. This book is ideal for you if you love to solve difficult Futoshiki puzzles no matter their size. You do not need to wade through tons of easy Futoshiki puzzles before getting to the real brain teasers. You will experience Futoshiki 7x7, Futoshiki 8x8 and Futoshiki 9x9. You get the perfect mix of different sizes of Futoshiki to keep you entertained for weeks. Once you pick up this book, you won't be able to put it back down. You have been warned! Futoshiki Mixed Grids Deluxe - Hard is a collection of 468 puzzles: 136 hard Futoshiki 7x7 puzzles 136 hard Futoshiki 8x8 puzzles 136 hard Futoshiki 9x9 puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this Futoshiki puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other English PuzzleBooks.net books. Futoshiki is also known as Hutoshiki and Unequal.