Mariella Frostrup talks to Ben Fountain about his satirical Iraq War novel Billy Lynn's Long Halftime Walk. Siri Hustvedt discusses her latest book, a collection of essays about her own life: Living, Thinking, Looking. Tom Tivnan, Features and Supplements Editor for The Bookseller, explains the world of internet book sales. And in conjunction with the British Library's Writing Britain: Wastelands to Wonderlands exhibition, we continue our series exploring how writers have been inspired by the landscape.