A resource center called Go-To-Market Strategies is offering a free ebook download of a title called "Social Media Marketing GPS." To get the download, you need to register your name & contact info (and they hope you'll sign up to get their other email alerts).
The email described the ebook like this:
Forty prominent marketers from Canada, England, India and the United States were interviewed on Twitter. The focus was on how to leverage social media, not in terms of the technology, but as a vehicle to build and nurture stronger business relationships. Each tweet included the hash tag #smgps.
What developed was the first business book of interviews written on Twitter by the people who were working in the space. Twitter became both a content platform and a distribution channel.
I haven't downloaded or read this, but I have gotten other titles from this company, TradePub.com. It isn't geared toward libraries, but I think it's valuable to use business info that comes from outside our field. So if you're into social media, you might find this useful.