Robert and Lynn Koegel (Koegel Autism Center, U. of California, Santa Barbara) offer a practical guide for parents, relatives, teachers, and practitioners who interact regularly with children who have autism and Asperger syndrome. They detail interventions supported by empirical evidence and explain Pivotal Response Treatment (PRT) in a practical way, focusing on core keystone areas called pivotal areas, which produce extremely widespread and rapid treatment gains. Each chapter includes vignettes and discussions. Following the scientific background, exactly how to implement the intervention with children at varying levels of functioning is explained in detail. Annotation 穢2012 Book News, Inc., Portland, OR (booknews.com)