This is the last edition of the London Calling season of World Book Clubs - which have been going out each Saturday during May. This week the programme are guests of The Nehru Centre - the cultural wing of the High Commission of India in London - and we're talking to acclaimed Bengali Indian author Amitav Ghosh about his haunting novel, The Shadow Lines. A moving and thought-provoking meditation on the very real yet invisible lines, which divide nations, people, and families, The Shadow Lines focuses on a family in Calcutta and Dhaka and their connection with an English family in London. From the tales of his colourful cousin the narrator conjures up a picture of London in his imagination that is so vivid that he recognizes it instantly when he visits years later and learns that real places can be invented inside your head. (Photo: Amitav Ghosh) Credit: Getty Images)