Small but mighty... this compact book slips easily into your pocket being only 4 x 6 inches in size. With 200 sudoku puzzles of varying levels of difficulty, you'll be entertained for hours on end. Whether you're a beginner or a pro, we've got you covered with 5 different types of sudoku games. Perfect travel gift to keep the mind active during long commutes or along-side beach cocktails. Customize the cover style and name to make it uniquely yours.