Four long-time residents of France have here combined their talents to compress the highlights of that nation into one, 256-page volume: Paris, Normandy, The Loire Valley, Provence and the French Riviera. Since most visitors confine their trips to three-or-so of these five areas, and rarely visit other lesser parts of France, this compact, $10.95 book will be regarded as just the right thing, a fortunate purchase. Our authors are French enthusiasts, and share Thomas Jefferson''s belief that "Every man has two countries, his own and France".