The culminating work of the clergy mester, the Book of the Archpriest, also called Book of Good Love, is still full of questions for the researcher and the reader. Its extension, the variety of genres that Juan Ruiz includes and intertwines (lyrical compositions, serranillas, examples ...) and the mastery with which he uses satire, sometimes religious tone, now the profane ... They turn this work into an extraordinary mixture of literary traditions, languages and stories product of the imagination and compilation of an author of whom we know little, which helps to fill, more if possible, the interpretation of his work. The meticulous analysis, after years of dedication, of the content and background of the archpriest's words by Anthony Zahareas and Óscar Pereira, will allow the reader to rediscover the Book of the Archpriest, finding new keys in the social, political, and ecclesiastical history above all, of the time in which it was composed.