Sudoku, "the crossword without words" comes with a warning: it is seriously addictive Mammoth Grab A Pencil Book of Sudoku is simply a must have for puzzle connoisseurs everywhere. Whether you are new to these super popular puzzles or already hooked, get set to enjoy this wonderful collection. Packed with almost 700 mind-twisting sanity testing puzzles of every level-from ego boosters to the dauntingly difficult- this book is sure to provide hours of entertainment. These simple to learn but hard to master puzzles are perfect for all ages and abilities. So grab your pencil and get ready to take on this compilation of numerical brain-teasers