This book is still being actively marketed by its publishing company, Prentice-Hall. However, you will find that when you go to download the images for this book, which, by the way, are instrumental to its use, that the page to which you were directed to in order to get them is gone. Go then to the publisher; you will find them there; download them and ATTEMPT to extract them. You will be informed that the file is corrupt, and cannot be expanded. It is nothing short of criminal that this book is actually still being sold but is NOT being supported. Unless you have more money you know what to do with, do not buy this book. To sell an unsupported book is show as much disregard and disrespect for the people spending their hard-earned money on it as is possible to show.