Both of the following versions of the text are taken from the same electronic copy, so are identical in content. The only difference is in the distribution. One of them is printed in full color and one without. The black and white version is only made available for those on a tight budget. There are a fair number of graphics in the book that lose meaning without color. The black and white copy should only be used in conjunction with the full-color electronic download.
While purchase through these links helps me keep track of the demand for this book, and I appreciate having some idea how many people are using it, you are under no obligation to buy here. You can, of course, download the electronic version of the textbook and print it out any way you like.
No matter how you access the book, happy reading!