Clive Staples Lewis was a British novelist, poet, academic, medievalist, literary critic, essayist, lay theologian, broadcaster, lecturer, and Christian apologist. Lewis's works have been translated into more than 30 languages and have sold millions of copies. The books that make up The Chronicles of Narnia have sold the most and have been popularised on stage, TV, radio, and cinema. His works entered the public domain in 2014 in countries where copyright expires 50 years after the death of the creator, such as Canada.