Sudoku, "the crossword without words" comes with a warning: it is seriously addictive! Colossal Grab A Pencil® Book of Sudoku is simply a must-have for puzzle connoisseurs everywhere. Whether you're 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 varying levels, from ego boosters to mind bogglers to the dauntingly difficult, this book is sure to provide hours of fun and entertainment. These simple-to-learn but hard-to-master puzzles are perfect for all ages and abilities, So grab a pencil and get ready to take on this compilation of numerical brainteasers!