A list of famous spy characters from spy novels with pictures where possible. Spy books have been popular for ages. A spy is a master of infiltration. The great clandestine operations involved in spying are the thing of legends, black ops by secret agents you wouldn't believe. Small wonder then that the best spy books are so popular, with their gadgets, subversion, and dual identities. Today, they can be found in movies, tv, books, comics, and games. This list of spy characters from top spy novels contains many of them.