Book excerpt: This book identifies the core competencies shared by expert therapists and helps clinicians—especially those providing brief dynamic/interpersonal therapy—to develop and apply them in their own work. Rather than being a cookbook of particular techniques, the book richly describes therapists' mental processes and moment-to-moment actions as they engage in effective therapeutic inquiry and improvise to help patients achieve their goals. The author integrates the psychotherapy and cognitive science literatures to provide a unique understanding of therapist expertise. Featuring many illustrative examples, the book offers fresh insights into how learning and interpersonal skills can be enhanced for both therapist and client.