Espionage Thrillers are a sub-genre of literature, specifically within the broader category of thriller books. They center around the intriguing world of espionage and covert operations, often involving complex plots, suspenseful narratives, and high-stakes scenarios. This genre can also intersect with business books when the storyline incorporates elements of corporate espionage or trade secrets. The narrative devices used in espionage thrillers create a tense and exciting reading experience, making them a popular choice for thrill-seekers and fans of spy narratives.