David H. Keller was one of the first psychiatrists to start writing science fiction. His work is regarded as far more complex and literary than that of his contemporaries, thereby foreshadowing the science fiction 'golden age' of the mid-20th century. Many of the best science fiction stories, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.