For those seriously interested in hobby robotics, Mobile Robots is required reading. Its authors follow in the tradition established by the collaboration between MIT and LEGO that began to bring the fruits of robotics research out of the labs and into the hands of the general public. Unlike LEGO Mindstorms, however, Mobile Robots is not aimed at those just starting out in science. This well written book reads something like the Voice of the MIT Media Lab, and the principal robot that it describes, the Rug Warrior, is not a beginning project. However, just about anyone with a basic background in electronics, computer programming and mechanical engineering will benefit from reading, working with and referring to it. The first part of the book does a very good job of describing a tutorial robot in detail. The second part starts with a discussion of the Rug Warrior's microcontroller and related topics. Once past this technical discussion, the book moves on to address a variety of general topics in mobile robotics. The tutorial robot first described is relatively inexpensive and easy to construct, while the Rug Warrior is neither. Most anyone wishing to build Rug Warrior will have to purchase it as a kit, as it employs parts that are difficult to obtain on one's own, and the book itself does not provide adequate information to construct it. However, Mobile Robots contains plenty of good general information that can be applied toward your own designs and projects, whether or not you decide to build a Rug Warrior.