Die Hard follows its source material Nothing Lasts Forever closely; many of the film's memorable scenes, characters, and dialogue are taken directly from the bestselling novel. The Los Angeles Times called it, "A ferocious, bloody, raging book so single-mindedly brilliant in concept and execution it should be read at a single sitting." Two other Thorp novels, Rainbow Drive and Devlin, were adapted into TV movies.
As a young college graduate, Thorp worked at a detective agency owned by his father. He would later teach literature and lecture on creative writing at schools and universities in New Jersey and California, and also wrote articles for newspapers and magazines.