Published in 1910, Coriat’s Abnormal Psychology is an in-depth study of the subconscious. The author emphasizes how the “normal” explains a disease and how a “disease” throws light on the normal. The book is divided into two parts. Part I is an exploration of the subconscious, including the dream state. Part II deals with the diseases of the subconscious, especially those which affect memory and how we experience sensations.