Simoes (Colorado School of Mines) and Farret (energy processing, Federal U. of Santa Maria, Brazil) explain to fellow engineers and to scientists and researchers both the nature of induction generators and their use in systems, particularly alternative energy systems involving wind and water. Compared to the more common rotary motor, they say, induction generators have lower maintenance demands and simplified controls, are smaller per generated kilowatt, and are more efficient in most applications up to about 500 kVA. No date is mentioned for the first edition; this second has been corrected and slightly revised. Annotation ⓒ2008 Book News, Inc., Portland, OR (booknews.com)