Is there anything new to say about Thomas Jefferson and slavery? The answer is a resounding yes. Master of the Mountain , Henry Wiencek's eloquent, persuasive book based on new information coming from archaeological work at Monticello and on hitherto overlooked or disregarded evidence in Jefferson's papers opens up a huge, poorly understood dimension of Jefferson's world. We must, Wiencek suggests, follow the money. So far, historians have offered...