I haven't bought any yet but my understanding is Art of War and Common Sense are the most useful, followed by Rights of Man, Cossacks, and Mandate of Heaven. El Dorado also good esp if you're playing in South America
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I haven't bought any yet but my understanding is Art of War and Common Sense are the most useful, followed by Rights of Man, Cossacks, and Mandate of Heaven. El Dorado also good esp if you're playing in South America