Cherie O’Boyle is Professor Emeritus of Psychology at California State University, San Marcos. She now lives in Northern California. When not writing, she is playing with her border collies and taking them to exotic locations in California such as Gridley for flyball tournaments, Galt for sheepherding trials, and Lake Tahoe for dog summer camp. Cherie is currently hard at work on the fifth in the Estela Nogales mystery series.