A manuscript found in the palace of an overthrown dictator, a mysterious Kurdish translator and an American computer scientist sick of war are the protagonists of this novel that examines - with both historic and legendary elements - two events that have marked the history of Baghdad: the Mongol invasion of 1258 and the American invasion of 2003. When Hulagu Khan entered Baghdad, he thought he had destroyed the Caliphate of the Abbasids, descendants of Muhammad. But one member escapes and orders a document to be compiled as a testimony of the lineage of the Prophet. His work is lost, and the title of caliph will be usurped by conquerors and tyrants and ultimately disfigured in the grotesque title, "Caliph of the Islamic State (ISIS)." In 2003 a US sergeant and his Kurdish translator find the manuscript and reveal its secrets.