This book was recommended to me by a marketing professor earlier this year. It took me a few months to get around to it, and a few weeks to actually get through, but all in all, it's pretty good. While the book seems to focus more on people in established careers, the information it contains could be made applicable to just about anyone.
It does have more of a tailored focus towards career-related social media and branding, and some of the chapters can be a little dry. The Authors are experts in the field and you can certainly tell that the book is related to their business. There are activities throughout the book that you can access to identify and develop your brand, but I haven't utilized these yet (I plan to at some point, however).
It'll probably take another read-through and actual engagement of the assessments that the book offers in order for me to get the most out of it, but if you're looking for information about creating and developing your "personal brand," it's worth checking out.