"Door with Seven Locks" by Edgar Wallace is a gripping mystery that follows Dick Martin on his last day at Scotland Yard as he stumbles into a web of intrigue involving a missing heir, a stolen book, and a series of murders. As he navigates this complex case, the scattered keys to a mysterious tomb with unique locks become central to unraveling a sinister plot to seize a fortune. This tale resonates today with its themes of greed, deception, and the lengths to which individuals will go for wealth, showcasing the timeless allure of mystery and the human condition. Wallace's masterful storytelling ensures that the suspense and intrigue of this classic remain compelling for contemporary audiences.