This book is fantastic. I am only through the first 100 pages and I have already learned a great deal about not only the camera but a variety of techniques like the lightning picture that I would have never thought of and can't wait to try out.
It explains very clearly what the settings will do for you or not do for you. I have had a D40, D70 and D90 before this so I am quite familiar with Nikon DSLRs. I think for a DSLR beginner this book is indispensible, but even for an old hand it has some extremely useful tidbits.