Author Douglas Preston relocated with his family to a peaceful farmhouse in Italy to work on his next thriller, only to find that he had moved next door to the scene of a notorious double murder. The perpetrator was none other than the Monster of Florence, a serial killer who had rampaged unchecked through the Tuscan countryside for years. “I had always considered myself a connoisseur of dark stories,” Preston said, “but I had never in my life heard a story as horrifying or as unbelievable as this one.” Preston is the author of this summer’s true-crime thriller, The Monster of Florence.