Cold wars, covert missions, and double lives
Spy fiction in English usually leans on secrecy, pressure, divided loyalties, and political danger. In this category you can find espionage novels ranging from older adventure classics to colder, more modern stories about intelligence work and betrayal.
The mix is fairly broad. There are recognisable names here such as John le Carré, John Buchan, Tom Clancy, Graham Greene, Robert Harris, and Ian Fleming, though stock may change. Some books sit close to historical fiction or wartime suspense, while others are more action-driven or conspiracy-focused.
You will also see a few titles that stretch the category a bit, including crossover works with literary, speculative, or graphic elements. That means this section is not only about traditional secret agents, but also about surveillance, informants, political schemes, and people caught between states and ideologies.
If you want a wider range of general investigations rather than covert operations, see Crime & Mystery. For faster, more chase-driven novels with less emphasis on intelligence services, try Thriller & Suspense. This is a decent category already, but it is still more specific than broad, and stock may change.