[Also published here.]

Mastering Regular Expressions has been around for a long time — this is the third edition of a book originally published a decade ago. Does that actually reflect justified popularity, or is it just that this is the only book-length treatment of the various regex engines, how they differ, and how to get the most out of them? I’m glad to say that doesn’t seem to be case: if you use regexes in any depth at all, you should probably read this book.