When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving Numbricks. You will experience Numbricks 10x10, Numbricks 13x13 and Numbricks 15x15. You get the perfect mix of different sizes of Numbricks to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Numbricks Pro. You start with easy Numbricks puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely hard Numbricks puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Numbricks Mixed Grids Deluxe - Easy to Hard is a collection of 474 puzzles: 48 easy Numbricks puzzles per grid size, totaling 144 easy puzzles 48 medium Numbricks puzzles per grid size, totaling 144 medium puzzles 48 hard Numbricks puzzles per grid size, totaling 144 hard puzzles 42 extra logic puzzles The goal of Numbricks is to fill in the missing numbers, in sequential order, going horizontally and vertically only. Diagonal paths are not allowed. I guarantee that every logic puzzle in this Numbricks 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 PuzzleBooks.net books.