If you're interested in computers, security, ethical hacking and Linux, then here's a deal for you. "Penetration testing: A survival guide" is a thorough course in how to set up a computer network for test purposes and then to try hacking it. It's well-written too, which is more than can be said for a lot of special-offer books that I get told about (and which consequently never get written about in this column).
It runs to more than 1,000 pages and normally costs $55. But you can download the PDF file right now for free, in return for nothing more than an email address.
To get a copy, head to http://www.tradepub.com/free/w_pacb47/prgm.cgi in order to download the 52 MB PDF file. It's free, and is unprotected, so you can even print it if you want.
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