This edition of this book is on audio cassette which is recorded separately on each channel. This means you will need a stereo playback mechanism which allows you to switch all the way to the left and right speakers alternately.
This is a very long, complex book, but still aimed to the average person. I managed to read the entire thing over many months.
It is very interesting and has a lot of good information and GREAT illustrations.
The only thing I have noticed is that this book with this ISBN can come in both hardcover and paperback. So watch out and be forewarned. Before you order it write to the sender to be sure it is hardcover. If you don't mind receiving a paperback, then this last sentence is not for you. Personally I like the paperback better than a hardcover. Paperbacks of this size are easier to handle. The paperback has everything that the hardcover has.