Acceptance and Commitment Therapy (ACT) is a psychotherapeutic interven­tion based on experimental evidence. Its goal is to help people implement concrete behaviors in accordance with their values ­ even in the presence of diffcult or interfering events. The au­thors clearly describe how ACT works and provide useful guidance for clinical practice. Soon the concepts of fusion and defusion become familiar and the Hexafex a way of thinking rather than appearing as a mere scheme. Accept­ance and commitment replace refusal and renunciation: this is the innovative therapeutic challenge of ACT.

This manual, enriched with metaphors and exercises that can be used in a therapeutic session, is intended for reading by specialists by tackling the themes of this approach with rigor and depth, taking the reader step by step into the heart of ACT. The appendix contains seven ACT questionnaires for clinical assessment.