Bloggers and their Books
Considering that Raynar made the diagram as a joke, apparently off the top of his head, I wouldn’t take this too seriously. Certainly, the indicators are pretty good that most blog readers are also book readers.
I suspect that the joke is based on a kernel of truth: Most people who read blogs are unlikely to go out and buy books written by the authors of said blogs. This is especially true, I suspect, for bloggers like Matt who regularly provide long-form essays. I’ll eventually read his book[*], Heads in the Sand, and imagine it’ll be well written but don’t expect to glean any amazing insights from it precisely because I’ve read Matt’s various blogs with some regularity over the past half decade. Conversely, books like Glenn Reynolds’ Army of Davids are more likely to provide new information to readers because InstaPundit is mostly a link blog with generally sparse commentary.
My guess would be that the vast majority of people who buy any of these books — especially those which sell relatively well — are people who are not regular readers of the authors’ blogs.
*Sooner rather than later, it turns out, since a free copy just arrived on my doorstep. Then again, since the graphic was about those who buy the books, this may well skew the made-up data slightly further.