Mario Spezi

Mario Spezi was an Italian journalist, author, illustrator, and caricaturist. He wrote the non-fiction true crime books Dolci Colline di Sangue (2006) and Il Mostro di Firenze (1983). He was a co-author in the book The Monster of Florence A True Story (2008) with American author Douglas Preston. Additionally, he was credited by Preston for providing details used in the novel Brimstone.