In the first episode of the second series of The C.S. Lewis Podcast, professor Alister McGrath speaks to Ruth Jackson about how Lewis’ seminal book, Mere Christianity, came to be written and what relevance it has in today’s culture.   USA listeners - enter our C.S. Lewis giveaway: http://www.premierinsight.org/competition    Find out more about the podcast: http://www.cslewispodcast.com