Duchess's novel, 'The Red House Mystery,' is a classic example of a cozy mystery set in the English countryside. The book follows the story of a murder investigation led by two amateur sleuths who uncover a web of secrets within the walls of the mysterious Red House. Duchess's literary style is characterized by witty dialogue, intricate plot twists, and sharp characterizations that keep readers engaged from start to finish. The book is a departure from Duchess's usual romance novels, providing a refreshing take on the mystery genre. It is a perfect example of Golden Age detective fiction, capturing the essence of the genre with its clever clues and captivating storytelling. Overall, 'The Red House Mystery' is a delightful and entertaining read that will appeal to fans of classic mysteries and fans of Duchess's other works alike.