Brabender (clinical psychology, Widener U., Pennsylvania) and Fallon (psychology, Fielding Graduate U., California) explain how therapists can employ the idea that groups change in a series of phases or stages, to group psychology. They set out a five-stage model that they have developed in their empirical and clinical work. The approach works best, they say, when used in conjunction with more standard theories, rather than in isolation as a substitute for them. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)