This book argues that the client is the main protagonist in psychotherapy with therapist as a supporting character and thus focuses entirely on the client's perspectives and contributions to treatment. It offers guidelines for capitalizing on clients' knowledge, skills, and strengths, including their capacity for self-healing, and ensuring the therapeutic alliance and the healing process are client centered. Vivid case examples bring these guidelines to life. Empirical research on client factors is also reviewed, including limitations and future directions.