Ibben is a collection of islands north of Essos in the Bay of Whales. The largest of these islands is Ib, which contains the cities Port of Ibben and Ib Nor. Until the Doom of Valyria, Ibben was ruled by a God-King. Now power is held by the Shadow Council, which is made up of nobles, priests, and wealthy guildsmen. Ibben is first mentioned in "A Game of Thrones", where Tyrion talks of rumors that mammoths "roam the cold wastes beyond the Port of Ibben". In 2002, Martin said the narrative would "probably not" take readers to Ibben, which he described as a "cold, mountainous, Iceland-sized island" (i.e. 40,000 square miles) in the Shivering Sea, with the Port of Ibben as the major city; some Ibbenese also live on smaller islands nearby or in colonies on Essos. Ibben is unmapped in the books as of "A Dance with Dragons", but similar to Martin's descriptions, the HBO "Viewer's Guide" world map gives the island's location as to the north-east of Essos. Martin said that due to a large whale population in the Shivering sea, many of the Ibbenses were whalers. The Ibbenses are known to chew whale blubber in order to maintain their metabolism in the cold climate. Several characters see Ibbenese whalers and cogs at the ports of King's Landing, Braavos, Maidenpool, Eastwatch-by-the-Sea, and the Iron Islands. The novels describe the people of Ibben as squat and hairy; Arya even meets an Ibbenese woman with a mustache. Tyrion and Varys meet foul-smelling Ibbenese, who "were as fond of axes as they were of each other". Arya sees "a dark brutal axeman from Ib" in her dreams. The Ibbenese are said to speak with low, raspy voices and to have their own language.