Gabanyi, Stefan.Whisk(E)Y. Abbeville, 1997. Handbook with more than 1,000 entries on everything from individual brands to the history of single-malt scotch.
Waymack, Mark H., and James F. Harris.The Book of Classic American Whiskeys. Open Court, 1995. Merits of various whiskeys, with history, distilleries, tasting notes, and instructions on making them.