This book explores how Schema Therapy and its underlying theory might be used in work with clients who suffer from psychosis, bipolarity and related symptoms. The first part of the book presents in-depth qualitative research featuring first-person testimonies that describe the self-states or 'modes' of a person with psychosis or bipolarity. These self-states involve a range of features, such as emotions, thoughts, motivations and behaviours, which manifest as patterns. The second part proposes the adaptation and application of Schema Therapy, a transdiagnostic approach working with emotion and interpersonal functioning for clinical work with these two groups. Offering unique insights, this text will appeal to a range of practicing clinicians, such as psychologists, therapists, psychiatrists and those with a special interest in psychosis or bipolarity.