Francis Spufford is a prize-winning author who returned to faith as an adult after years as an atheist. His latest book is "Unapologetic: Why despite everything Christianity can still make surprising emotional sense". 
He says he didn't write it to try to give an objective argument for Christianity, but to show why its concepts, doctrines and beliefs help those who believe it make emotional sense of the world.
He chats with renowned author Philip Pullman who is an atheist.  They talk about new atheism, the atheist bus campaign, the concept of sin, the person of Jesus and more.
For Unapologetic http://www.amazon.co.uk/Unapologetic-everything-Christianity-surprising-emotional/dp/0571225217
For Philip Pullman http://www.philip-pullman.com/
For more Christian/non-Christian debate visit http://www.premier.org.uk/unbelievable or get the MP3 podcast http://ondemand.premier.org.uk/unbelievable/AudioFeed.aspx or Via Itunes
You may also enjoy:
Unbelievable? 8 May 2010 - "The Good Man Jesus and the Scoundrel Christ" This is the latest book from the pen of prominent atheist author Philip Pullman. With Christian journalist Martin Saunders and Bible Scholar Anthony McRoy.
Unbelievable? 12th March 2011 - Music & God Christian David Robertson and atheist musician Gordon Livesey discuss whether music can have soul if you don't believe in the soul.
Join the conversation: http://www.premiercommunity.org.uk/group/unbelievable and via Facebook and Twitter