E. Phillips Oppenheim's 'Peter Ruff and the Double Four' is a riveting tale of mystery and suspense set in the early 20th century. The novel follows the unconventional and resourceful Peter Ruff, a criminal mastermind who operates under the guise of a respectable businessman. Oppenheim's writing style is characterized by its intricate plotting, clever dialogues, and unexpected plot twists, making it a classic example of early 20th-century detective fiction. The story's exploration of morality, deception, and justice adds depth to the thrilling narrative. Overall, 'Peter Ruff and the Double Four' is a compelling read that keeps readers on the edge of their seats till the very end. E. Phillips Oppenheim, a prolific British author known for his espionage and thriller novels, drew inspiration from his own experiences in intelligence work during World War I to create the character of Peter Ruff. His detailed knowledge of the criminal underworld and sharp wit shine through in 'Peter Ruff and the Double Four,' showcasing his expertise in crafting engaging narratives filled with intrigue. I highly recommend 'Peter Ruff and the Double Four' to readers who enjoy classic detective fiction with a twist. Oppenheim's skillful storytelling and complex characters make this novel a must-read for fans of the genre.