The preface has been provided as an Adobe PDF file.
You will need a copy of the Adobe Acrobat Reader to view this format. If you do not have this software, you can go to the Adobe web site and download a copy for free.
Preface.pdf (68 KBytes)
Depending on your browser configuration, clicking on the link above may attempt to open the PDF file in a browser window. To download to your computer rather than viewing in your browser, either right-click (Windows) or click-and-hold (Mac) on the links above. Then select "Save Target as..." or "Save Link as..." from the popup menu that appears. Choose a location on your computer to which to save the file, and hit OK or Save. You can then find the file on your computer using the Finder or Explorer and open the file up in the Acrobat Reader program.