The self plays an integral role in human motivation, cognition, and social identity. A must-have addition to any acceptance and commitment therapy (ACT) practitioner’s library, The Self in Practice translates the ACT model’s most difficult–yet essential–process into easy-to-apply steps and user-friendly language. Every client that partakes in ACT must identify a self as part of their treatment, and clinicians often report that observing the self is the most difficult of all six core ACT processes. This is because it is so hard for people to shed pre-conceived notions of who they really are, and negative perceptions of the self can lead to feelings of low self-worth that stand in the way of treatment. Problems with the self arise when clients orient themselves in the world and learn to relate to others, but these problems can vary considerably. For example, some clients may have deficits in developing a strong sense of self in the first place–particularly if they are diagnosed with autism spectrum conditions (ASC). Depressed clients or those with borderline personality disorder (BPD) may develop a skewed, negative sense of self, and those with narcissistic personality disorder (NPD) may develop an inflated sense of self. With this unique road map, you will learn to apply the complex theory of the self into everyday practice, and help all clients develop empathy, compassion, and flexible perspective-taking–leading to better treatment outcomes and better lives for clients.