"L'eresia nel Medio Evo" is a study of the history of the development of religious beliefs among the peoples of Europe in the Middle Ages. The author of the book, Felice Tocco, studies in detail the spread and influence of various heretical teachings in medieval times, and also examines the reaction of the church and the authorities to these phenomena. The book highlights the conflicts between the official church and its opponents, the role of the Inquisition in the fight against heretics, as well as the reasons for the emergence and spread of various beliefs in the Middle Ages. Lucia in the Middle Ages is a must-read for anyone interested in the history of religion and culture in the Middle Ages.