In this very well-written book, carefully documented with citations and references, Drs. Bryant and Harvey, both psychologists, review the theoretical basis of acute stress disorder and explore its power to predict the later onset of PTSD. Certain features do seem predictive, especially numbing, depersonalization, the sense of reliving the experience, and motor restlessness. Vulnerable individuals seem to use punishment as a way of interpreting experiences; they worry more and seem to exaggerate both the probability of future negative events occurring and the adverse effects of these events; and, of course, there may be a genetic predisposition as well. The authors hypothesize that individuals who use adaptive strategies that permit sustained activation of the fear network aroused by the traumatic event and go on to integrate the associated information correctively will benefit from a resolution of transient stress reactions, whether this occurs spontaneously or as a result of treatment.