This product is a collection of three paperback books on hang gliding by author Dennis Pagen from the 1970s. The books cover various topics within the genre of sports and recreation, specifically focusing on air sports like hang gliding. With a compact size of 9.25 inches in height, 6.25 inches in width, and 0.5 inches in length, these books weigh a total of 10.4 ounces. Written in English, these books offer a comprehensive look at hang gliding during that era, making them a valuable resource for enthusiasts and adventurers alike.