In May of 1956, an Italian publishing scout took a train to the Russian countryside to visit the country's most beloved poet, Boris Pasternak. He left concealing the original manuscript of Pasternak's much anticipated first novel, entrusted to him with these words from the author: "This is Doctor Zhivago. May it make its way around the world."Pasternak knew his novel would never be published in the Soviet Union, where the authorities regarded it as...