You have to decide what you want to study about the WBTS: strategy, tactics, military, leaders, weapons, politics, constitutional, international views, battles, campaigns, cavalry, cultural, army, navy, women, spies, conspiracy, etc.
Lots of topics to learn about!
WBTS Sorry, what is that. YEah, so many topics to read. Already have way too many Christmas books including Tanks, Traitors, and Rome.