Book: confessions of a public speaker

Anyone out there who sometimes (or more often) have the liberty to speak in front of audiences knows it: speaking is an art. Since I'm kind of new in the arena I figured I could use some help.

The past year I've been doing a lot of presenting. I'm constantly trying to improve what I'm doing. I read books, take ideas, and put them into practice. I'm focusing on these areas now:

* The presentation itself - the slides, the storytelling, the content
* The delivery
* Incorporating social media

Scott Berkun has written a very interesting book about how to do an impressive presentation: Scott Berkun's Confessions of a Public Speaker which is packed with a lot of tips and wisdom about the delivery. It covers topics that you don't usually come across in presentation books. For example, how to deal with different physical environments in a chapter called 'How to Work a Tough Room.'