If you’re a fantasy writer and you’re interested in creating secondary worlds that feel authentic to the period you’re taking inspiration from, I think the best thing you can do is read primary sources. That might look like epic literary works such as Beowulf or the Epic of Gilgamesh, social satires like The Canterbury Tales, histories like The Peloponnesian War, military guides like Sun Tzu’s The Art of War, or countless other works of law, philosophy, theology, mythology, and scripture.
