In his book by name of 'In Xanadu - A Quest', William Dalrymple retraces the epic journey of Marco Polo from Jerusalem to Xanadu, the ruins of the palace of Kubla Khan, north of Peking carrying oil from Holy Sepulcher, in the summer of 1986. He calls this book as a quest - not a vacation - just because it involves hardship and suffering not accompanied by a vacation. An intrepid traveler, and entertaining writer, Dalrymple offers an anecdotal history of the people and places he encounters en route through Israel, Cyprus, Turkey, Syria, Iran, Pakistan, and the breadth of China. An overland passage through these closed countries is an incredible travel feat in itself.