"Clásicos Castellanos: Libro de Buen Amor" is an outstanding work of medieval Spanish literature written by Juan Ruiz, which is still studied and revered. The book is considered the rider of the golden age of Spanish poetry, the secret of love and the ability to use various literary genres. In "Libro de Buen Amor" the author tells a story about his impressions, experiences and observations about love, morality and life in general. The text surprises with its frankness, deep philosophical background, as well as humorous approach to well-known topics. "Classical Castilians: The Book of Good Love" is not only a literary masterpiece, but also a mirror of the social and cultural aspects of the Middle Ages, which is studied by scholars and read with delight by lovers of beautiful words.