I keep stumbling upon free eBooks lately, LOL

Here's another one, from Radian6 "
30 Ideas for Your Social Media Plan"
And, it turns out they have a HUGE cache of free eBooks related to various social media topics and the industries that utilize SM.
Check that out here.
Three other titles I noticed that looked particularly relevant and useful are:
The Building Blocks of a Sound Social Media Policy
ROI of Social Media: Myths, Truths and How to Measure
How to Transform Your Small Business With Social Media