For whisk(e)y aficionados Jim Murray's annual Whisky Bible has been indispensable since it was first published in 2003. Every year's issue includes hundreds of new whisky reviews spanning the globe and all its varied whisky styles. Jim's reviews are very well written and the book's comprehensiveness is absolutely unmatched. I would delve into a detailed description of the 2011 version of the Whisky Bible, but I don't think I could beat the write-up from the folks over at WhiskyIntelligence.com. Check out their summary of the book here or hit up Amazon to add this must-have book to your collection.
If your tastes tend more towards whiskey with the 'e' you might prefer to pick up the 2010 version while it's still on a few bookstore shelves. It lists the world's best whisky as the all-American Sazerac 18-year-old Kentucky Rye, while the latest version has Ballantine's 17 Year Old Scotch listed as number one.