*Builds on the success of Hacking Exposed, which sold over 80,000 copies and generated $1 million in six months. *Since Linux is readily available, many hacking tools are written using Linux. It's a hot topic among hackers, and is considered a 'digital playground'. *Fills a gap in marketplace - currently there are very few books geared specifically to Linux hacking. *Major industry support for Linux - companies such as IBM, Compaw, Intel, HP and Dell are investing in Linux and partnering with leading distributors.