Pierre Janet (1859-1947) is regarded as one of the most seminal clinicians and thinkers of the last two centuries. His work spanned the fields of psychotherapy, psychology and philosophy.Giuseppe Craparo, PhD, is a psychologist, psychoanalyst, and associate professor of clinical psychology at the Kore University of Enna, Italy. Onno van der Hart, PhD, is a psychologist, retired psychotherapist, and emeritus professor at Utrecht University.

• Volume I. 1. Isolated Psychological Phenomena 2. Forgetting and Various Successive Psychological Existences 3. Suggestion and the Narrowing of the Field of Consciousness Volume II. Chapter 1. Subconscious Acts 2. Anesthesias and Simultaneous Psychological Existences 3. Various Forms of Psychological Disaggregation 4. Mental Weakness and Strength