Facebook, Twitter and LinkedIn are more than just social networking sites. They're also a great way for businesses to market their products, connect with customers and create a dialog regarding their services. Get started by checking out the following books.

Get connected: the social networking toolkit for business by Starr Hall, Chadd Rosenberg

Facebook marketing: an hour a day by Chris Treadaway, Mari Smith

Facebook marketing: leverage social media to grow your business by Steven Holzner

Smart networking by Liz Lynch

How to succeed in business using LinkedIn: making connections and capturing opportunities on the Web's #1 business networking site by Eric Butow and Kathleen Taylor