Just a Little Bit in a dilemma as to which book to buy for WPF

Hi Guys,

Just finished reading a c# book from Jesse Liberty. "Programming C# 3.0". Wanted to buy a book on WPF. There are two books that i narrowed down too, but cannot make a decision. If someone could provide me the feedback on these two as to which one i should go for, that would be great.

1) Windows Presentation Foundation Unleashed (WPF) by Adam Nathan
        I have heard quite good reviews about this book. Published in 2007, this book covers 3.0

2) Pro WPF in C# 2008: Windows Presentation Foundation with .Net 3.5, second Edition.
by Mathew MacDonald. - This book is just published in Oct 2008. Covers 3.5 as the title metions it.
 - So compared to the first one, this book covers .Net 3.5

Both have good reviews but would prefer to buy just one. Would love if someone would recommend which one i should go for.

If someone has any better suggestion, i would appreciate that too.

I am just new to C#, and plan to develop my skill in building some application for windows.

Thanks