Mariella Frostrup discusses what defines a Jewish novel with stand up comedian, tv presenter & novelist David Baddiel and writer & broadaster Naomi Alderman, as Jewish Book week begins in London. Jim Crace talks about his new novel Harvest, which will also be his last as he has announced he is retiring as a novelist. And Indian writer Amit Chaudhuri explains why, after setting three novels in his native Calcutta, he has turned to non-fiction in his new account of the city.