Mark Riddle and Robert Hanneman from UCR have published their introductionary textbook on social network methods and graph theory online. The book can be download for free (68 MB) or seen in an HTML version here.

For those getting started with network analysis and especially UCINET as a tool, the introduction can be very helpful. The textbook is very much along the line of the most common usage and operations of UCINET

http://faculty.ucr.edu/~hanneman/nettext/