UPDATE: The video presentation on how this was carried out by the author is given at the following link: http://www.wolfram.com/broadcast/video.php?c=88&v=185
I am really impressed by the way this textbook was created. This is so much more than just a textbook, I would like to create class notes type CDF document in this very style.
Mathematica CDF Textbook example
How can I create something like this, is there a stylesheet I can use?