22 - Green Rust by Edgar Wallace

When a dying millionaire asks his lawyer to track down and covertly protect his long-lost niece, who stands to inherit his fortunes, little does he know that his life is about to end in an unsolved murder. Enter Oliva Cresswell, the unsuspecting heir, who is working as a cashier in a bustling West End store. Her life takes an unexpected turn when she crosses paths with a man named Beale, who claims to be a wheat merchant. After a harrowing attack in her apartment, a job offer from Beale, an inexplicable dismissal from her job, and her increasing reliance on Beale, the riddles around her keep growing. Dive into this gripping tale as the mysteries unravel one by one. (Introduction by Don W. Jenkins)