Espionage Books are a genre of literature that primarily focuses on the practice of spying, intelligence, and secret operations. These narratives often involve aspects of mystery, suspense, and thrill, immersing the reader in a world of intrigue and clandestine activities. Although largely fictional, they can also be based on real-life events, making them a subset of non-fiction books as well. Some Espionage Books may take the form of memoirs, providing personal accounts of individuals involved in espionage. Despite their specific focus, they are a subset of the broader category of books, often overlapping with detective novels and other mystery and thriller literature.