There are two web appendices to the book: The Technological Enablers of Pervasive Games and the full list of contributor bios. Both are laid out in the same style as the book and have been created at the same time. The contributors file contains longer bios of all the people who wrote for the book.
The tech appendix, as we have always called it, provides a rough overview on the current state of the art of positioning, proximity recognition, and wireless communication technologies useful in staging pervasive games. While a pervasive game can be staged with no technology at all, especially large-scale games and game-mastered games often utilize some of the technologies covered in this appendix.