A Magical Society: Silk Road
A Magical Society: Silk Road is a 160 page supplement detailing great overland trade routes.
Borrowing extensively from the caravans of Central Asia, A Magical Society: Silk Road covers a variety of topics: what factors engender great overland trade routes, what elements accompany the existence of silk roads, and how do caravans function on the road (with consideration to terrain). Due to general unfamiliarity with Central Asia, an entire chapter is dedicated to the historic Silk Road with maps detailing the major trade destinations. And last but not least, there is a trade system with over 1,000 trade goods, giving ultimate tools for economic simulation.