This novel is one of Spark's best. I first read it as a teenager and couldn't put it down. It takes place amidst the political turmoil of the Middle East in the early 1960s and the trial of Adolph Eichmann in Jerusalem. It is filled with intrigue and with almost too many things happening as Barbara Vaughan, an English spinster of partly Jewish heritage, travels to the Holy Land to be with her boyfriend, an archaeologist working in Jordan on the Dead Sea Scrolls. Crossing from Israel to Jordan she is mistaken for a spy and must go undercover as a muslim woman covered from head to toe. Check out the original review by Malcolm Bradbury in the New Yorker for more details.