Interest has risen recently in the reactors, which are said might produce energy and transmute radioactive wastes in a cleaner and safer manner than current nuclear power reactors. Nifenecker, O. Meplan, and S. David (all Institute of Nuclear Physics, France) offer an intuitive explanation of the current technology and economics, for students and practitioners in nuclear reactor technology who have not necessarily encountered the approach before nor are intimate with such complex codes as the Monte Carlo type. They begin by setting out the context of energy use and sources, then discuss such aspects as elementary reactor theory, practical simulation methods, fuel reprocessing techniques, generic properties, and scenarios for development. Distributed in the US by AIDC