Game of Thrones is a phenomenon. As Carolyne Larrington reveals in this essential companion to George R R Martin's fantasy novels and the HBO mega-hit series based on them the show is the epitome of water-cooler TV. It is the subject of intense debate in national newspapers; by PhD students asking why Westeros has yet to see an industrial revolution, or whether astronomy explains the continent's climatic problems and unpredictable solstices ('winter...