I’d like some recommendations for books about social media marketing. Specifically, best practices and examples of how companies are using sites like Facebook/Myspace/Twitter to build their businesses.

Thanks

I know that you are looking for books but if you are interested in a website that can give you all of this information then i found one while i was looking around for twitter guides. The website is a good foundation for social media marketing and gives you some good pointers and guidelines.

one of the links would be http://socialmediaabc.trafficvault.com
or just the main site http://www.trafficvault.com
check em out if you want i think they can help you