The narrator of this splendidly expansive novel of high intellect and grand passion is an American anthropologist at loose ends in the South African republic of Botswana. She has a noble and exacting mind, a compelling waist, and a busted thesis project. She also has a yen for Nelson Denoon, a charismatic intellectual who is rumored to have founded a secretive and unorthodox utopian society in a remote corner of the Kalahari—one in which he is virtually the only man. What ensues is an exhilarating quest and an exuberant comedy of manners: “A dryly comic love story about grown-up people who take the life of the mind seriously.”