The Book of Knowledge 20 Volume Set is a vintage red hardcover collection of encyclopedias published by The Grolier Society Inc. in 1953. This illustrated set, made in North America, is a valuable and comprehensive resource for children. Each volume includes an index for easy navigation, making it a practical and educational addition to any bookshelf. The set is a classic piece of Americana and would be a prized possession for any collector or enthusiast of antiquarian books.