Michael Ruhlman's Ratio continues to astound and amaze me. The book, already in it's 4th printing following it's publication in April, just picked up a kudo from Amazon for Best Nonfiction of 2009 (So far).
When he first told me that he was going to write it, I thought it was a great idea. But I figured that it would only sell to professional chefs, culinary students and cooking geeks looking for a way to simplify their cooking and the way they think about recipes. Well, there is either a hell of a lot of people who fit that description or the book has much wider appeal than I'd assumed.
Best Nonfiction of 2009... So Far