I've just finished Seth Godin's latest book, Tribes - We Need You to Lead Us. It currently has 4.5 (of 5) stars from 37 Amazon reviewers. The Publisher's weekly editorial review on Amazon offers a concise description of the book. While the title relates to the books discussion of grass-roots, long-tail, informal groups Seth calls tribes, it actually contains quite a bit about leadership; why it's important, how to nurture it, how to exercise it, etc.
I recommend the book, even though some of it serves as merely a reminder of things we all know. Since I spend a lot of time driving, I downloaded the free audiobook version (see links below). It's also a short book. I like Seth's use of real-life examples/stories.
The audiobook is available for free download on Audible.com. NOTE: Audible.com requires you to register - so I chose another path.
I found this link on squidoo.com that was offering the same audiobook in downloadable MP3 format. I chose to use the MP3 link that appears after the AAC link. BTW: Seth Godin is also the founder of the squidoo.com site, so I figure it's just as legit to download the files from this site.
Garr Reynolds posted a review of the book, along with some short videos of Seth on his blog here. Here's Seth Godin's personal website.