Ruby by Example shows you how to take advantage of Ruby as you explore Ruby's fundamental concepts in action.

Code Craft will help take your programming beyond writing correct code to writing great code.

If you thought hacking was just about mischief-makers hunched over computers in the basement, think again.

View a sample chapter, Chapter 5: Blinkenlights

If you're responsible for keeping a network secure, you'll find Linux Firewalls invaluable in your attempt to understand attacks and to detect and even prevent compromises.

Hacking VoIP is your map and guidebook to where VoIP's biggest weaknesses lie and how to shore up your security

The Linux Programming Interface is a comprehensive reference to the Linux API for experienced system programmers, as well as an introductory guide to these low-level interfaces for system programming newbies.

Master the elegance of functional programming with Land of Lisp, an illustrated guide to the world's most powerful language. Learn by doing as you write games like Dice of Doom, The Wizard's Adventure, and the updated classic, Grand Theft Wumpus!

Join Kanna, Kanta, Yamane, and Gloria in The Manga Guide to the Universe as they explore our solar system, the Milky Way, and faraway galaxies in search of the universe’s greatest mysteries: dark matter, cosmic expansion, and the Big Bang itself!

Nagios is robust but also complex, and Nagios: System and Network Monitoring, 2nd Edition, updated to address Nagios 3.0, will help you take full advantage of this program.