So what's everybody's favorite regex book?  I'd have to say that Jeffrey E. F. Friedl's Mastering Regular Expressions (2nd Ed) is the best thing I've found.  It's pretty much the de facto standard, too, from what I gather talking to other regex experts.  So, while I expect most people to agree that this is *the* book, I'd be interested to hear what *other* books people like, especially if they've found one they like better than this one (assuming they've read both).

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Steven A Smith
President, AspAlliance LLC
CIO, Lake Quincy Media, LLC