Book excerpt: Donald A. Norman, a popular design consultant to car manufacturers, computer companies, and other industrial and design outfits, has seen the future and is worried. In this long-awaited follow-up to The Design of Everyday Things, he points out what's going wrong with the wave of products just coming on the market and some that are on drawing boards everywhere-from "smart" cars and homes that seek to anticipate a user's every need, to the latest automatic navigational systems. Norman builds on this critique to offer a consumer-oriented theory of natural human-machine interaction that can be put into practice by the engineers and industrial designers of tomorrow's thinking machines. This is a consumer-oriented look at the perils and promise of the smart objects of the future, and a cautionary tale for designers of these objects-many of which are already in use or development.