TIMBER psychotherapy is a novel, translational and biomarker informed, mindfulness-based cognitive behavioral therapy approach that addresses some of the current treatment gaps for PTSD, depression and traumatic psychosis. This treatment manual offers practitioners and patients alike a step-by-step guide to TIMBER (acronym for Trauma Interventions using Mindfulness Based Extinction and Reconsolidation of memories) psychotherapy, and has been divided into four parts: Understanding Complex Trauma and Traumatic Psychosis; Methodology and Application; Training Professionals; and Policy Implications & Future Research Directions. In addition to a strong rationale and evidence base for the TIMBER approach, the book also provides case examples accompanied by videos (available separately). Its special features include reproducible client handouts, assessment tools, and a list of resources for training to use TIMBER.