1493

Charles Mann's new book about the world transformed by the "Columbian Exchange" lacks the single-minded focus of his popular 1491, in which he endeavored to prove that pre-Columbian America was densely populated and culturally advanced. Still, the new book is full of surprising information. Robertson Dean's bass voice provides authority even to Mann's most speculative claims. While some of his regular mispronunciations (for example, "King dynasty" for "Qing dynasty, pronounced "Ching") can be trying, his performance is consistent and clear. Mann's focus on ecological change, trade with Asia, and the Indo/African aspects of New World settlement is laudable. If you haven't thought about the effects of Columbus's exploration for a decade or two, Mann will rock your world. F.C. (c) AudioFile 2011, Portland, Maine