"Higher-Order Perl" available for free download

I'm very fond of this book. I think anyone that works in dynamic languages (particularly Perl, Python, Ruby, JavaScript, etc.) should give it a read. If you don't have a lot of functional programming experience, it does a fantastic job introducing a lot of great concepts.

I checked it out from the library first (after a long wait), and then after returning it, I went out and bought a copy. I don't buy many books these days, since I have a fantastic public library a few blocks away, but this was one that I simply didn't want to be without.

other than programming perl, this is the only must-read perl book. its a classic.