She is one of the best-known crime writers of all time but few know the extent of Agatha Christie's archaeological pedigree. Married in 1930 to eminent archaeologist Max Mallowan, Christie spent two decades living on excavation sites in the Middle East, writing her crime novels and helping out with her husband's work. Travel by boat and on the Orient Express to far-flung places such as Cairo, Damascus and Baghdad inspired some of Christie's best-known works of detective fiction...