Sartre's first book published as volume 10 of the "Nouvelle Encyclopedie Philosophique" which was commissioned by the editor, Henri Delacroix. In it, Sartre summarizes numerous outdated theories about imagination and proposes a phenomenological perspective. Sartre was at this time much impressed with the work of Husserl whom he claimed had made a major contribution towards the psychology of the imagination. This is only the first part of a much larger work. The publisher rejected the second half which was not published until 1940 in a revised form under the title L'Imaginaire.