Field book guide suggestion?

I just ordered my Nikon D7000---up from my current D40x. I am wondering if anyone would suggest a guide book to buy to go along with it. I have found several both at Barnes and Noble and online and just want to see if any of you might have a preference of authors. Thanks.

I prefer the guides from Thom Hogan, Darrel Young and David Busch. All are excellent guides - well written and well researched. The Photo Bert laminated cheat sheets are also handy.

I think the Thom Hogan guide is only available direct at www.bythom.com.