DO NOT BUY THIS BOOK! It's packed with stuff which just isn't relevant, for example, there are 100 pages of a simple "C" programming guide. Another large section is basically a DOS 3 command line guide, which the author reveals he produced while working for the underground hacking community, but looks to me like a re-hashed MS-DOS user guide. There's a ton of stuff on TCP/IP, all of which (and more) is available in other more authoritive publications. The lists of ports is incomplete, and descriptions of cable types is just a waste of space. There's a large section on different operating systems, most of which is just history. The CD supplied (TigerBox etc) is the one saving grace (otherwise zero stars), and the chapter which describes these tools is worth having, but I daresay it's all available on the net in any case or the on-line help (I haven't looked). However, the number of pages taken up with showing you how to install Tiger is just staggering, with screen shots showing the "Next" button and a caption telling you to press it, occupying far too much space, and isn't this at odds with a subject which is supposed to be technically challenging? When the author strays into the real subject, there are just glib comments like "hack the SMTP gateway" but there's no detail or juicy stuff. Oh, and the listings... pages and pages, for example, source code for a TSR... well haven't things moved on just a little?
All in all, a complete waste of money and shelf space. My advice is buy "Hacking Exposed". Oh, and by the way, the version of TigerTools isn't even the full version.