Mary Roberts Rinehart

Mary Roberts Rinehart (1876-1958) was an American writer dubbed the 'American Agatha Christie,' renowned for her mystery novels, including her debut *The Circular Staircase* (1908), which popularized the 'had I but known' narrative style. A trained nurse turned prolific author, playwright, and journalist, she served as the first female war correspondent on the Belgian front during World War I, interviewed royalty, survived breast cancer, and advocated for awareness. She published dozens of works, blending mystery, romance, suspense, and humor, becoming one of the most successful female authors of her era.[1][2][3]