Currently reading
David and Goliath: Underdogs, Misfits, and the Art of Battling Giants
The Speed of Dark
Battle Royale
Marianne Dreams
Coming to Our Senses: Healing Ourselves and the World Through Mindfulness
XDM Extreme Dungeon Mastery
I greatly enjoyed the humor contained here, even though some sections got out of hand. I also loved the anecdotes from the authors (Tracy freakin' Hickman fer goshsake!). This isn't a bible to be referred to for handling trouble, it's more of a manifesto to be read and digested. I haven't run a game using the XD20 system, but expect it would be LARPish, and that seems to be the point of this book - RPG is basically Improv with a stricter setting and more rules.