Ron Jefferies has released his book:

 

Extreme programming adventures in C#

 

Although from the editorial chatter it looks like its mainly aimed at learning the basic skills (What is NUnit.. and so on) I'm probably going to get it anyway, just to see if there are some hidden nuggets.

Overall I'd recommend it if you havn't had any XP experience and want to see what all the fuss is about.

(link via Eric)