>I've been suspicious of the site we're discussing for some time, but I have to confess that's only because it's ".ru," which I think is Russia. I strongly suspect that it's a pirated copy of the book, which I think is available elsewhere online legally.
>

IIRC, this book was originally part of the free library at Informit.com, which no longer exists. I assume they had permission and posted the book legally, but that doesn't mean the other sites have. Informit was probably the original source of this HTML and other sites copied it.