Emil Lucka (1877-1941) was an Austrian writer. After studying history, art history and philosophy, he worked at a bank in Vienna and began writing articles and essays published in various magazines. In 1901 he converted from Judaism to Catholicism. His philosophy was influenced by Immanuel Kant and his friend Otto Weininger. He wrote biographies, but is best known for his work on sexuality. He wrote a number of popular books, most of which have been translated into Russian, French, and other foreign languages.