Out of funds and longing for a sea voyage, young doctor Ralph Leslie jumps at the chance to sign aboard a luxurious millionaire’s yacht as steward of the After House. His job is easy sailing until one summer night, when the dream voyage suddenly becomes a nightmare of blood and terror. One of the ship’s officers is thrown overboard; another one is killed with an axe. As panic sets in on the boat, only the young doctor remains calm enough to try to solve the murders. But can he stay alive long enough to do it?

Here is another classic from the Mary Roberts Rinehart, a master of mystery and suspense novels known for their humor and ingenuity.