A compact guide to southwestern France with a strong focus on history and architecture. Within the borders of this region are prehistoric caves and grottos, among the largest collection of medieval towns and castles in Europe, and splendid cathedrals. Organized as a driving guide, it includes helpful town plans. It covers the region from Toulouse west across the Pyrenees, the Atlantic coast, Bordeaux and Biarritz.  (FRN53, $28.95)