Leigh Chambers' guest is Azadeh Moaveni talking about her book, Guest House for Young Widows; Among the Women of Isis, which tells the true stories of women who chose to leave their homes, families and country to join the Islamic State in Syria. Cheryl Misak discusses A Sheer Excess of Powers, her biography of mathematician and economist, Frank Ramsey. And Peter Morfoot talks about Knock ‘Em Dead, the latest in his Captain Darac series of crime novels set in Nice.