The author, a former Peace Corps trainer, discusses culture shock, common mistakes made by expats and the overall process of adapting to a culture in this down-to-earth, scholarly book. Short excerpts from writers on the experience of travel are interspersed throughout the book, including unforgettable commentary by Mark Twain, Rudyard Kipling, Francis Noel Coward and C.S. Lewis.  (GEN136, $21.95)