Not since the Rubik's Cube has a puzzle been this hot. . . . It can lower your blood pressure, relieve stress-even make you smarter. It might just be the least-harmful addiction around." --Newsweek* Give the gift of Sudoku with this hardcover keepsake book.Sticky Sudokupresents the revenue-generating power of Sudoku in a package designed for gift giving, featuring a Post-it-like notepad of puzzles.The Puzzle Society offers more than a hundred Sudoku puzzles in this effortlessly portable, ergonomic package. Features include a hardcover breakaway binding that opens flat to reveal a stack of peel-and-stick Sudoku puzzles.* Includes both 9 x 9 and 6 x 6 puzzle grids with answers. Puzzles peel away from the pad and stick virtually anywhere for on-the-go play.