To download this book as originally published (second edition, 1992), you must first download the free DjVu reader. It’s like the Adobe Acrobat Reader.
Go here: http://www.djvuzone.org/download.htm.
Once it is on your computer, you can read the book (unless you use FireFox). Download it here: http://www.garynorth.com/freebooks/docs/21f6_47e.htm.