This product is a set of three identification and price guides for glass collectibles, including American Glass, Depression Glass, and 20th Century Glass. The books are part of a reference book series and are written in English. They are published by various publishers and are available in both hardcover and paperback formats. The guides cover various glass collectibles, including Fiesta, Pottery, Porcelain, and Carnival Glass. The books are illustrated and are vintage. They are authored by various writers and are suitable for collectors and enthusiasts interested in glass collectibles.