Reviewed by Marian Evans, American Renaissance.  Paul Theroux, The Last Train to Zona Verde: My Ultimate African Safari, Houghton Mifflin Harcourt, 2013, $27.00, 353 pp. The last time AR readers met Paul Theroux he was traveling south across the eastern part of African continent from Cairo to Cape Town. His journey was by land, sometimes by boat, never by plane. He told the story in Dark Star Safari. Since then, he has traveled across Asia and Russia, a…