Not so long ago, wine was an exclusively European product. Now it is thoroughly American; emblematic of Napa Valley, an area idealized as the epicenter of great wines and foods and a cultural tourist destination. But the romanticized accounts you find about it and its denizens is not what you'll encounter in James Conaway's candid book. Napa at Last Light exposes the often shadowy side of the latter days of Napa Valley-marked by complex personal relationships,...