"London - Im Nebel der Themse" ("London - In the Mists of the Thames") is a german exclusive source and scenario book for the Cthulhu RPG by Pegasus Spiele.
It is not a translation of Chaosiums "London Guidebook", but almost completely a new product, researched up from the ground to cover two eras, the Gaslight epoch (1890s) and the classical 1920s era. Among the topics covered are every days life in the city, transportation, occultism and the Cthulhu Mythos, the suburbs, parks, cemetaries, the underworld, the haunts of the city and more.
The scenarios are:
"Nebel der Wahrheit" ("Mist of Truth") by Jens Peter Kleinau and Heiko Gill set in the year 1888.
"Elwoods Kinder" ("Elwoods Children") by Wolfgang Schiemichen set in the 1920s.