Quillen's Essentials of Genealogy:

Great price for a great introduction to online genealogy!First in the new Quillen’s Essentials of Genealogy series, this book covers the use of computers and the Internet to successfully do your own genealogical research. It teaches readers about the Internet as an effective genealogical research tool, explains what genealogy databases are, where they are, and how to use them, details pitfalls to watch out for, tells the value of message boards and blogs, and much more.