For a much better buy (89 cents), and for a much better formatted collection of all twelve books, try
MoibleReference located here:
http://www.amazon.com/Twelve-Yellow-...8238284&sr=1-4
Of course, if one likes spaces between paragraphs, then I would suggest buying the OTHER collection and NOT the one I'm talking about here in this post.
This MobileReference Collection is superb. I own it.
Don