Iola Leroy; or, Shadows Uplifted, by Frances E. W. Harper.

Recognized as a significant literary achievement, this novel holds the distinction of being one of the best-selling works by an African-American author prior to the 20th century. Its impact and popularity reflect the cultural and historical context of its time, showcasing the struggles and experiences of African-Americans. The narrative weaves together themes of identity, resilience, and social commentary, offering readers a profound insight into the era's challenges and triumphs.