John Banville, the Booker prize winning author, has written his last book. In a wide ranging interview with Dion Fanning of The Currency as part of a forthcoming podcast interview series, Banville says the book called The Singularities, which will be published in October, is his “final word”. “I’ve done my last book, I will keep writing the crime capers because I like doing them and they put bread on the table but I’ve finished my last book,” he said. Banville won the Man Booker prize in 2005 for his novel, The Sea. When he received the reward, he said…