David Perdue's "Unofficial LEGO Mindstorms NXT Inventor's Guide" is scheduled for an Oct 2007 release. Not much information on it other than what you can find on the Amazon.com link. If anyone has any additional info, please let us know.
From Amazon: The LEGO MINDSTORMS NXT set is a very powerful robotics toolkit, but it lacks a detailed user's guide. This is the user's guide that every MINDSTORMS owner needs. The Unofficial LEGO MINDSTORMS NXT Inventor's Guide begins by introducing the NXT set and directing the reader through setup. Following this is an in-depth discussion of the set's electronic elements and other LEGO pieces as well as building techniques. Next, it covers the NXT-G programming environment and introduces several unofficial programming languages, providing examples of code and programming insights along the way. Finally, it presents a method for designing NXT robots in addition to a series of projects with building and programming instructions for creating complete robots. This book will enable readers at all levels to plan, construct, program, and test their own NXT robots. Includes a MINDSTORMS NXT Brickopedia.