This first Manual Therapy Acceptance and Commitment published in French is an excellent introduction to the innovative and integrative model that underlies the ACT. The ACT is presented in terms of its core processes. Effective exercises are described as well as measuring instruments to monitor client progress with the ACT process. This book is recommended for therapists who want to expand their clinical practice and become familiar with this therapy flagship of the third wave of TCCs, as well as to students and researchers in psychology who want to learn the underlying model the Relational Frame Theory.