Hard cover ones anyway. Yeah, this one shocked me. Of course, I just downloaded War & Peace for free from Amazon so I guess anything is possible in the modern world of both books and electric files that we call books even though they're not.
I'm in Los Angeles at the moment, hanging out with the gang from Marketplace. A colleague here points out that it's rare for Amazon to share any insight into Kindle sales figures and that they're also about to report earnings so may be looking for a positive story.