Mary Roberts Rinehart (1876–1958) was a prolific American writer renowned for her contributions to the mystery genre, often earning her the moniker "the American Agatha Christie." Born in Allegheny City, Pennsylvania, Rinehart initially trained as a nurse before turning to writing as a means of financial support. Her first major success came with the publication of The Circular Staircase in 1908, which established her reputation in the literary world. Throughout her career, Rinehart authored numerous novels, short stories, and plays, many of which were adapted for stage and screen. She also served as a war correspondent during World War I, providing firsthand accounts from the Belgian front. Rinehart's work is characterized by its strong female protagonists, intricate plots, and keen social observations, securing her legacy as a significant figure in American literature.