When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving Nurikabe. You will experience Nurikabe 10x10, Nurikabe 12x12 and Nurikabe 14x14. You get the perfect mix of different sizes of Nurikabe to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Nurikabe Pro. You start with easy Nurikabe puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely hard Nurikabe puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Nurikabe Mixed Grids - Easy to Hard is a collection of 276 puzzles: 24 easy Nurikabe puzzles per grid size, totaling 72 easy puzzles 24 medium Nurikabe puzzles per grid size, totaling 72 medium puzzles 24 hard Nurikabe puzzles per grid size, totaling 72 hard puzzles 60 extra logic puzzles The goal of Nurikabe is to determine whether each of the cells of the grid is “black” or “white” according to the following rules: All of the black cells must be connected. Each numbered cell must be part of a white island of connected white cells. Each island must have the same number of white cells as the number it contains. Two islands may not be connected horizontally or vertically. There cannot be any 2 x 2 blocks of black cells. I guarantee that every logic puzzle in this Nurikabe puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. Nurikabe is also known as Cell Structure and Islands in the Stream.