It was the Nathan book that Rick recommended.

>If it's the book I'm thinking of, it's also a great book. http://www.amazon.com/Programming-WPF-Chris-Sells/dp/0596510373/ref=pd_bbs_sr_2?ie=UTF8&s=books&qid=1202310784&sr=8-2
>
>>I am in no position to declare what the best one is but that is the one I bought, too, and so far I like it. It was also recommended here the other day by Rick Strahl, which is a great endorsement IMO. Rick is always a jump or two ahead of most of us with new technologies.