The web page philosophy is simplicity.

This is partly driven by the fact that I have to do all the maintenance. 
Since I have plenty of other things to do, the web-site is without fancy graphics, buttons, bells, whistles and what nots.

The main objective of this site is to provide two features:

• Allow people who have bought the book(s) to obtain an up-to-date list of errors and corrections

  Giving a taste of what the book(s) contain before rushing out to buy one ;-)
  

I have deliberately not put exercise material in the book, as it tends to be software and hardware dependent, and I did not want the book to become a "How to use software xxx" manual. Furthermore, software and hardware change every few years, and exercise material would rapidly become outdated.