Kent Hoffman is a clinician, developmental researcher, and cofounder (with Bert Powell and Glen Cooper) of Circle of Security International.
Glen Cooper has worked as a psychotherapist with individuals and families in both agency and private practice settings since the 1970s. He has extensive training in family systems, object relations, attachment theory, and infant mental health assessment.
Bert Powell began his clinical work as an outpatient family therapist in a community mental health center, where he helped a broad range of families find and use unacknowledged strengths to address their problems. Powell is certified in psychoanalytic psychotherapy by The Masterson Institute in New York City.
AudioFile Earphones Award winner Coleen Marlo has earned numerous Publishers Weekly Listen-Up Awards and won an Audie Award for her narration of Snakewoman of Little Egypt by Robert Hellenga.
Christine M. Benton is a Chicago-based writer and editor.
Daniel J. Siegel is clinical professor of psychiatry at the University of California-Los Angeles School of Medicine, and executive director of the Mindsight Institute in Los Angeles. He is founding editor of the Norton Series on Interpersonal Neurobiology.