Metasploit - The Penetration Testers Guide - 2011

The Metasploit Framework has long been one of the
tools most widely used by information security professionals,
but for a long time little documentation
existed aside from the source code itself or comments
on blogs. That situation changed significantly when
Offensive-Security developed its online course, Metasploit
Unleashed. Shortly after the course went live, No
Starch Press contacted us about the possibly of creating
a book to expand on our work with Metasploit
Unleashed.