The book is a great aid for an Assembly programmer. Several common tasks are very well described, and book in general makes hard things easy to understand. It contains usefull tables such as most common msdos and pc-bios interrupt, all the 80486 instructions, etc. There is, however, one flaw that all over the book. It is probably the worst examples assembly listings I’ve seen in a long, long time. Where short, focused examples should have illustrated what the authors wishes to point at, the authors choose long listings which are needlessly advanced. I have no clue why. They aren’t very instructive. You hardly learn more assembly because you see longer listings. (a guess is that the fact that authors often get more money if the book takes up more pages probably is a fact to concider…)