The Mark of the Lion Trilogy, written by Francine Rivers, is a bestselling urban fiction Christian novel series set in ancient Rome. The trilogy follows the life of Hadassah, a young Christian slave, as she navigates the challenges and dangers of the Roman Empire. The books explore themes of faith, courage, and the power of love. With its rich historical detail and compelling characters, The Mark of the Lion Trilogy has captivated readers and has been praised for its powerful portrayal of Christian values in a secular world.