Title: Verbotene Liebe. Briefe eines Unbekannten.
Description: Siemsen's important novel about "Forbidden Love," published by Verlag Die Schmiede, an avant-garde literature publishing house in the 1920s in Berlin. The book was later banned by the Nazis. 

English title: Forbidden love. Letters from a stranger.
Subjects: LGBTQ fiction before Stonewall