I loved the first edition of this good book. It made me a better searcher with AltaVista, which is what it's designed to do.
The section on searches one can make with structural elements in the URL makes the book worthwhile, but all of that is handled in a single chapter.
Why anyone would need Appendices on the most common words searched on AV, the frequency of words used in AV searches, or a sample of 1,000 queries is beyond me. The same goes with the chapter on the history of AltaVista. The subtitle is "How to find anything on the Internet." Nobody is buying a history of AltaVista.
As good as the early pages are, the book runs out of gas about halfway through and loses itself in a lot of padding.
I'd think twice about going for the second edition because I'm suspicious it's just more padding and that the essential stuff hasn't changed much. If you don't have the first edition, however, you might find even the first half of the second edition worth the price.