A lot of thought went into the idea of whether to sell paper books or e-books.
Here are some of the reasons why we chose to sell e-books...
1) They are cheaper (For you and for us)
2) They make referencing to things much easier
3) They are easier to distribute, you get them instantly
4) They save paper (You can pick and choose what you want to print)
You must have a current version of Adobe Reader to view our ebooks.
If you do not have this program installed, you can download it for free here...