From the publisher's website:
"This book contains everything needed to explore the dangerous life of working for a Trader Prince. It includes four new homelands, extensive background information on trade and travel in the Manirian wilderness, barbarian customs, Trader Prince Houses, and new occupation and magical keywords. Other sections include a gazetteer detailing Western Maniria, House Caroman (a 'typical' Trader Prince family), and their home, the demon-haunted city of Fay Jee. Also provided are numerous adventures and scenario seeds, gathered into a story arc that allows the heroes to rise from humble beginnings to the very pinnacle of their House."