I would get Darrell's book. He knows how to address Nikonians of all levels, like he did on the D300 book, after writing dozens of articles for the Nikonians Resources and going through our intense editing. Furthermore, with the help of Jim - a technical writer with over 25 years experience- the explanations get expanded. So you have two experienced writers and one tough editing team working for you. Rocky Nook has received sterling reviews for the depth of content, breadth of coverage, and warmth of delivery of the D300 book. And the D700 one is even better.