13-volume set of The Harvard Classics Deluxe Registered Edition, published by P.F. Collier & Son Corporation in 1968. The set features classic literature in English. Included in the set are multiple authors, with a focus on classic literature. This collectible set is a valuable addition to any bookshelf, especially for those interested in ancient Greek philosopher Plato. These are in good condition, but the covers are starting to crack from almost 60 years old. Please see in the pictures.