I found this post at http://www.navisiondepot.com/navision-book.html
This is the only Navision book out so far that specifically focuses on Dynamics Nav 2009. Very well-written and enjoyable to read, this book provides an excellent, detailed guide to the key new features of Nav 2009, specifically the new role-tailored user interface, the new three-tier architecture, and the resulting dramatically improved ability to interface Nav 2009 with the web and with non-Navision applications. It also has a nice section on implementations and the sure-step methodology. Although the stated target audience is Nav consultants and developers, it is actually a very worthwhile read for anyone who is implementing or considering implementing Nav 2009 in their environment; you don't need to be super 'techie' to get a lot of value from this book.