Mary Mackay(1855 - 1924) was an English novelist famous for her melodramatic themes and better known by her pen name Marie Corelli. Beginning her career as a musician, Corelli became one of the best - selling authors of her time. Her books were collected by the Royal family as well as by Churchill. In her writings, she attempted to unitedifferent spiritual ideals with Christianity. Her first novel published in 1886, was A Romance of Two Worlds.