When the weather outside is frightful, the solving inside"s delightful with these fun and challenging puzzle books. They make great stocking stuffers, too160;There"s a flurry of fun packed into this unique collection, which features a variety of snowflake-like, hexagon-shaped grids. To complete the puzzles, solvers have to place the numbers one through six around each of the hexagons WITHOUT repeating any number in the partial hexagon shapes along the border.