Terror. This is the index where you will find books involving spies, espionage, secret agents, conspiracies, government corruption, organized crime, war and revolutionaries. And modern thrillers—for instance of the Dan Brown variety—just a bit different from Michael Crichton, who was known as the "Father of Techno-Thrillers."
Whereas the "Horror" Index features stories with monsters, this index deals with human monsters, mobster, gangsters, banksters, and the nasty things governments do. And because, as with all these indices, there is a cross-over between categories, (since most books fit into several), I have supplied at the bottom other pages to explore to help find what you are looking for. Enjoy these great books!