This book would not have been written were it not for:
John Neidhart at Pearson Education, who was willing to indulge my desire to write about virtual world design despite the fact that he was actually looking for a book about AI.
Stephanie Wall and Chris Zahn at New Riders, who gave me an enthusiastic welcome when I appeared on their doorstep at short notice as a result of a Pearson reorganization. They gave me the time and freedom I needed to finish the job properly.
My wife, Gail Bartle. From June 2002 until April 2003, I turned down all consultant and design work I was offered so I could write this book. Without her quiet but unfailing support, you wouldn't be reading this now.
I'd also like to thank Damion Schubert and Matt Mihaly ...