Book excerpt: A follow-up to his bestselling American Whiskey, Bourbon & Rye: A Guide to the Nation's Favorite Spirit, Clay Risen's Single Malt is an introduction to the long history, fascinating science, and incredible diversity of malted whisky, as well as a practical drinker's guide to buying and enjoying hundreds of the greatest examples of the distiller's tradition. With maps of essential whisky regions of Scotland, profiles of each of the makers, and photographs of the bottles and tasting notes for each of the most widely available expressions--compiled from tasting sessions conducted by a panel of leading whisky experts--readers will discover a rich vein of knowledge about one of the world's most storied beverages. Selected from more than one hundred active distilleries in Scotland, the 330 expressions featured in this book provide a curated yet comprehensive primer of the single-malt whiskies any growing aficionado should be familiar with. Additional features include a directory of distilleries, Risen's top whisky picks in various categories, and a full index of the expressions featured in the book.