From the publisher's web site: Trade Lords gives a city-by-city breakdown of the availability and prices for many common trade items on Athas, compiles existing official information on Athasian Merchant Houses, trade forts and emporiums. This download compares approaches to trade among ten separate Athasian cultures, and contains an illustrated chart to quickly determine lunar illumination on any given night and time. Also included are NPC stats for caravans for different levels of play.