This well organized book on customizing the Lego NXT Robotic System serves several hobbyist and educational goals in an outstanding fashion. It is a full introduction to sensors, actuators, and microcontroller-based robotics in the context of the Lego NXT System. In the process of describing the sensors, customization of NXT parts and support chips and electronics it provides an excellent introduction to hobbyist electronic construction. Finally, together with David Cook's excellent "Robot Building for Beginners", also in the excellent Apress Series, it provides a though introduction to the parts and techniques for constructing and debugging all types of hobbyist robotics and electro-mechanical systems. The differences from the previous excellent edition of "Extreme NXT" are subtle yet important: improved illustrations of construction technique are provided throughout the book; exciting additional projects on GSR (skin resistance measurement) and interfacing the NXT brick with a keyboard interface liven this edition, additonal explanatory material is included in the chapter on I2C interfaces and in Appendix A on electronic construction techniques.

I would recommend this excellently presented and illustrated book as a well organized tutorial in many aspects of robotics and electronic construction.

— Ira Laefsky
MSE/MBA