The product is a 1986 Encyclopedia Britannica Macropedia Knowledge Depth Vol. 13 15th Ed. in hardcover format. Published by Britannica in the United States, this encyclopedia contains a wealth of information on general knowledge. With a focus on volume 13, this edition provides in-depth coverage on a diverse range of subjects in English language. Perfect for students, educators, and general readers looking to expand their knowledge base with a reliable and comprehensive reference resource.