When the Peace Corps sends Susana Herrera to teach English in Northern Cameroon, she yearns to embrace her adopted village and its people, to drink deep from the spirit of Mother Africa--and to forget a bitter childhood and painful past. To the villagers, however, she's a rich American tourist, a nasara (white person) who has never known pain or want. They stare at her in silence. The children giggle and run away. At first her only confidant is a...