(user summary) This sourcebook describes the regions which lie along a river in the continent of Aventurien simply called "Der Große Fluss" (The Great River) Included are regions which belong to the great Middle Empire (Mittelreich), which are quite conservative and equal Germany in the Middle Ages, and the independent state Albernia, which reminds of England. Moreover, the lands of the fairies, that lie close to Albernia, are also featured. As always, history, culture, important persons and secrets of the regions are given.