C. S. Lewis's genius, his breadth of scholarship, his adult conversion from atheism to Christianity, his love of argument in the context of true friendship, his gift as a powerful communicator, all establish Lewis's methods as an apologetical model second to none.[1] Mere Christianity was voted the best book of the twentieth century by Christianity Today magazine in 2000. Over fifty books have been published to his credit, and annual book sales remain over two million, with more than 200 million copies of his books sold worldwide. All have never been out of print, and there are more than 200 individual fan clubs, readers groups and C.S. Lewis societies around the world.[2][3]