Y2K does not have anything to do with viruses. Now, of course, a number of the items mentioned do have something to do with general security. Unfortunately, the level of detail given in the book is far from sufficient to protect the user against these threats. Indeed, the threats themselves are not described particularly well, and I could go through a very similar exercise in pointing out the weaknesses in the general security material. Given the total size of the book it really isn't a work on viruses.
Nothing is covered in depth, and nothing is covered completely accurately.
A pamphlet on viruses surrounded by some opining on security issues buried within a lot of careless research.