The Golden Trade of the Moors: West African Kingdoms in the Fourteenth Century, by Edward W. Bovill. Introduction and bibliographical essay by Robert O. Collins. 299 pages, maps, notes, bibliography, index. Princeton: Markus Wiener Publishing, Inc., 1995. $14.95 (Paper) ISBN 1-55876-091-1Islam in West Africa: Religion, Society, and Politics to 1800, by Nehemia Levtzion. (Variorum Collected Studies Series) 324 pages, plate, table, notes, index. Brookfield, VT: Ashgate Publishing Company, 1994. $89.95 (Cloth) ISBN 0-86078-444-4