Stanley G. Weinbaum 
The Dark Other 

Pat is a beautiful young woman with many admirers. Nick is a young man with a secret. When his dark side interferes with their burgeoning love, things turn grim, and psychologist Carl Horker has to intervene. The plot wraps up in a way that the coming Hollywood would approve of, and with a deus ex machina that a theater would envy. Stanley Grauman Weinbaum (April 4, 1902 – December 14, 1935) was an American science fiction writer. His career in science fiction was short but influential.