Acknowledgments Introduction Telling Lies and Keeping Secrets in Psychotherapy The Nature, Prevalence, and Functions of Lying and Secret Keeping: Why Do We Do These Things? Clinical and Empirical Perspectives on Secrets and Lies in Psychotherapy Factors Underlying the Likelihood, Process, and Consequences of Client Disclosure and Concealment: ""It's Complicated"" Therapist Deception The Columbia Project on Lying in Psychotherapy: What Did 1,345 Psychotherapy Clients Tell Us? Common Clinical Lies: Suicidal Thoughts, Self-Harm, and Emotional Distress Common Clinical Lies: All Things Sexual Common Clinical Lies: Substance Use and Abuse Common Clinical Lies: Trauma Common Clinical Lies: Clinical Progress and Feelings About One's Therapist Secrets and Lies in Psychotherapy: Summary and Clinical Implications References Index About the Authors