One of history's most prolific yet least-known authors is Marcus Terentius Varro (116-27 B.C.), a Roman writer who supposedly produced 620 books. They included writing on oratory, history, literature, philosophy, grammar, law, geography and agriculture.

Unfortunately, only fragments of his work remain. The only surviving complete work by Varro is his treatise on farming.Little is known about the author, who was born in a Sabine village. In 48 B.C., he fought for the Roman general Pompey against Julius Caesar at the Battle of Pharsalus. Caesar later forgave Varro, and he rose to become a praetor, or magistrate.