Really nice to see iCrossing's What is social media? heading the list of free social media eBooks on Mashable. We put a new version out a couple of months ago, and will need to update it again soon I'd imagine.
I'd not read all of other eBooks on the list - some that I've downloaded for reading are:
- American Express's Using Social Media for Business (more of an article than eBook)
- Chris Brogan's Social Media and Social Networking Starting Points
- New Media Consortium's Social Networking, The Third Place, and The Evolution of Communication
Like the story of how the eBook was translated into Chinese, continuing to get referenced like this is one of the reasons we're working on more eBooks at the moment to share via Creative Commons licence, our way of living our mantra of "be useful to your networks".