"Um Ulm Herum" ("Around Ulm") is an exclusive german source and scenario book for the Cthulhu RPG published by Pegasus Spiele.
It contains source information (history, important places, castles, caves, myths etc) on the Swabian countryside and the city of Ulm in the 1920s plus two scenarios taking place in this area.
The scenarios are:
"Unsere liebe Frau aus den Wäldern" ("Our dear lady out of the woods") by Steffen Schütte.
"Das Blaue Tor" ("The Blue Gate") by Jan Christoph Steines.