""The Door of Dread: A Secret Service Romance"" is a novel written by Arthur Stringer and published in 1916. The book follows the story of a young American woman named Hope Wayne who is recruited by the British Secret Service to work as a spy during World War I. Hope is sent to Germany to infiltrate a group of revolutionaries who are planning an attack on the British government. Along the way, she falls in love with a British agent named Gerald Desmond,...