When Stig, Derick and I decided to publish a PHP book, our editor proposed to do it as part of the Bruce Perens' Open Source Series. Not only is the series focused on open-source but in the true open-source spirit it is also made available as open-source under the Open Publication License. We loved the idea because it would give our work the widest possible exposure.
A few days ago I was informed that the PHP 5 Power Programming book has now been downloaded over 1 million times. Exposure no doubt. And considering that there are about 4.5 million developers out there, it's safe to say that probably between 1 in 5 PHP developers have actually laid their hands on it (or should I say their computer screens on it).
I'm glad we've managed to serve the larger PHP community by making the book so broadly available. As this book is targeting the experienced developer it's even more remarkable that so many people have downloaded it. The PHP developers community has truly matured.
You can find more information about the book on the Prentice-Hall web site.
