Rivers of London: The Roleplaying Game: In Liberty's ShadowA Guide to Case Files in the USA What's Inside Rivers of London: In Libertys Shadow A Guide to Case Files in the USA is a sourcebook for Rivers of London: the Roleplaying Game, based on the Rivers of London series by Ben Aaronovitch. The book also contains an exclusive piece of microfiction by Aaronovitch, Ask, And Ye Shall Receive. The United States London isnt the only place where magic is returning to the worldOn the far side of the Atlantic Ocean,