This is the complete Liturgy of the Hours, the Divine Office, in four volumes. All four are in black, flexible, leather binding, for easier handling. With smyth sewn binding, this edition is durable and long-lasting. The covers and spines have gold inlay. The content of this edition is the same as the less expensive, vinyl bound edition. This black leather edition, however, with gilded page edges, is truly beautiful. It's well worth it.