Mention the word “espionage” and most people think of James Bond. However, the cloak-and-dagger genre of literature has a lot more spies than Ian Fleming’s most famous creation. In fact, even Sherlock Holmes, the fictional detective brought to life by Arthur Conan Doyle dabbled in some double agent duties in a few of his books. While not all spies have gone on to receive blockbuster film adaptations, it doesn’t make their adventures any less riveting.
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