Conversation with Einstein

In "The Conversation with Einstein", Jeremiah Laing is a time-travelling historian from the 42nd century, who becomes marooned in the year 1931 after saving a man named Sidney Chalmers from an accident. After an intriguing conversation at one of Einstein''s lectures, the trio discover that Chalmers holds an invention capable of compressing interstellar distances into a single step - the Portal.The...