It may be no surprise that the bestselling computer book so far this year is “iPhone: The Missing Manual,” by my colleague David Pogue (O’Reilly, 2007).

But here is something that did surprise me: The most popular edition of this book isn’t on paper, or the PDF file that O’Reilly Media also sells. It is the downloadable application for the iPhone, according to Tim O’Reilly, the chief executive of O’Reilly Media.

To read this report in The New York Times in full, see:
bits.blogs.nytimes.com/2009/02/26/why-are-iphone-users-willing-to-pay-for-content/