* Most commonly recognized: He is best known for The Prince and Discourses on Livy.
* Other major works: The Art of War, Mandragola (a play), History of Florence, and The Prince's Letter.
* Less well-known: Machiavelli wrote numerous other works, including letters, poems, and treatises on military tactics, diplomacy, and history.
To answer your question directly, there is no definitive answer to how many books Machiavelli wrote. It depends on how you define "book" and what you consider a published work. However, it's safe to say that he was a prolific writer and left a lasting impact on political thought.