Any computer books you buy, you should buy from
http://www.bookpool.com/ as they are Soooooooooooooooo much cheaper than anywhere else.
Programming Perl 3rd edition was $49 from O'reiley, $39 from Amazon, and like $28 or $29 from Bookpool. I was mad because I didn't discover bookpool til the day that my Prog Perl arrived from O'reilly.
Since then though, I've probably bought another $200 or $300 worth of stuff from Bookpool, including one book that i had to return for a replacement because it was bound upside down.
Got personal service from them, not just a response-bot. They've been great. Wish I could have known about them 3 years ago... would have saved tons of money.
Check out any of the oreilly titles there and compare... way cheap!
--mark