AVR-Chat

Hi,

I haven't seen a good website that teaches how to write C for the AVR 
and would like to get some opinion from the group about which book 
you'd recommend.  Sometimes, ratings on Amazon are a bit skewed.  I'd 
prefer to stick with AVR Studio and WinAVR. I already have the 
Kernighan & Ritchie book on C. 

From Amazon, I see the following available.  Which would you pick?

a) Embedded C Programming and the Atmel AVR by Richard Barnett, 2nd 
Edition, $70+

b) Embedded C Programming and the Atmel AVR by Richard Barnett, 1st 
Edition, $20+

c) C Programming for Microcontrollers Featuring ATMEL's AVR Butterfly 
and the free WinAVR Compiler by Joe Pardue (Paperback - Mar 2005) , 
$50+

Thanks,
bronze