"Running Water" is a romantic thriller set against the backdrop of political intrigue in Europe. The story involves the mysterious disappearance of a young woman named Joan, and it follows the efforts of the protagonist, Richard Austin, to unravel the mystery surrounding her disappearance. The novel explores themes of love, duty, and sacrifice, and it is known for its suspenseful and engaging narrative.A. E. W. Mason was a popular author during the early 20th century, and his works often combined elements of romance, adventure, and mystery. "Running Water" is considered one of his notable novels and has been praised for its gripping storytelling and well-drawn characters.