In "The Conquest of the Sahara," Douglas Porch tells the story of France's struggle to explore and dominate the great African desert at the turn of the century. Focusing on the conquest of the Ahaggar Tuareg, a Berber people living in a mountain area in central Sahara, he goes on to describe the bizarre exploits of the desert's explorers and conquerors and the incompetence of the French military establishment. Porch summons up a world of oases, desert...