Nagios is a very capable and flexible fault manager. This section of my site contains information on projects I have been involved with that center around Nagios.
Nagios 3 Enterprise Network Monitoring: Including Plugins and Hardware Devices. Syngress, May 2008. I am the lead author on this book on Nagios 3; the book focuses on integrating Nagios into larger organizations. Though it has a significant amount of Nagios 3 specific information, the principles and practices discussed in it will apply to any version of Nagios.http://www.nagios3book.com - contains all source code from the book along with additional code and patches the authors of this book created.