Perry Rhodan
Perry Rhodan picks up nearly every theme that has ever appeared in science fiction. People from outside have criticised the series, but its commercial success during several decades has become a literary phenomenon in itself.  If nothing else, Perry Rhodan provides a mirror of the 1960s Cold War, 1970s New Age, and 1980s peace movement in its story line.  The series has an important influence on German writers in the field. The writing of the series still goes on.