I did some more digging on the Nikon D400 book – a simple google search on the ISBN 9783827244826 (click here to run the search) reveals several different website listings. The most interesting one is from the actual publisher Markt+Technik (this was mentioned in the comments few weeks ago, but never reported). The www.mut.de link on the search result page doesn’t go anywhere, but if you click the Cached link, Google will bring you back in time where you can see the same Nikon D400 book on the official publisher’s web site:
I did contact the author Michael Gradias for more info.