Will Hindmarch and I are releasing our first book as Gameplaywright Press in the next week or so. It's called Things We Think About Games, and it contains the obvious subject matter, given the title.
Here are two additional awesomenesses about it:
Foreword by Robin D. Laws
Introduction by Wil Wheaton
The first twenty out the door will be signed, numbered, and with shipping and handling on the house. Line forms over at gameplaywright.net.