I'm the author of several books, most of which are about Linux in professional environments. These include "Beginning the Linux Command Line", "Beginning Ubuntu Server Administration" and "Pro Ubuntu Server Administration". Being a Linux user since 1992, the motivation to write books came early. Much of the documentation that you'll find on line (especially in the early days of Linux) was hard to read, so I wanted to translate that information into something that's understandable. I'm like the guy between the developer and the end user. Writing books is not the only way I accomplish this goal. Apart from being an author, I'm a technical trainer as well, delivering Linux courses all over the planet. And if a customer has something interesting, I might be willing to do some consultancy projects as well. In the past few years, most of these have included Linux High Availability and Virtualization. Recently I have developed my skills in SELinux as well and I have helped customers implementing their own custom policies.
Apart from all that, I have a personal life as well. I live in the Netherlands (that's a small country in Europe in case you've never heard of it). I like to travel, and my work allows me to do that often and I like running and photography. I've ran 4 Marathons while writing this and I'm preparing for the Washington Marathon this fall.