The Book of Good Love (El Libro de Buen Amor), considered to be one of the masterpieces of Spanish poetry, is a semi-biographical account of romantic adventures by Juan Ruiz, the Archpriest of Hita, the earliest version of which dates from 1330; the author completed it with revisions and expansions in 1343. The work is considered as the best piece in the medieval genre known as Mester de Clerecía. The Book begins with prayers and a guide as to how to read the work, followed by stories each containing a moral and often comical tale.