[cutler]

That would be "Programming Perl" by Larry Wall. For me too it was the only programming book of that size I was compelled to read cover to cover. Larry is a great writer but maybe that's to be expected from a linguist. If Python is the number cruncher's favourite language Perl (and subsequently Ruby) must be the linguist's favourite. I got into programming after being intrigued by regular expressions in the advanced section of a chapter on Search And Replace in Dreamweaver 3 Bible back in 2000. At the end of the section there was a footnote to Jeffrey Friedl's "Mastering Regular Expressions" which I read cover to cover. Most of the examples were written in Perl as it was the only language with regex support so deeply baked-in so I had to then go to the source - "Programming Perl" by Larry Wall.