This Therapist Guide presents information on the nature of social anxiety, empirically supported cognitive–behavioral techniques used to treat it, how to best implement these techniques, and how to deal with the problems that arise during treatment. The authors strive to offer a complete treatment that is informed by individual case conceptualization within an evidence-based practice framework. Socially anxious individuals commonly view anxiety as an all-or-nothing experience: Some people have excessive social anxiety, and others—healthy people—do not experience social anxiety. It is helpful for clients to begin to think of social anxiety on a continuum. In this treatment, collaborative empiricism is operationalized as an active therapist and active client working together to overcome social anxiety. The therapist brings expertise about social anxiety and cognitive–behavioral therapy. The client brings expertise about herself and the motivation to make changes in her life. For this treatment to be successful, the therapist must be comfortable with clients who may become extremely anxious.