This volume by Hermann Nunberg contains the most complete and conscientious presentation of a psycho-analytic theory of neurotic processes which we at present possess. Anyone who is anxious to have the relevant problems simplified and smoothed away will scarcely find satisfaction in this work. But anyone who prefers scientific thinking and can appreciate it as a merit when speculation never abandons the guiding-line of experience and anyone who can enjoy the beautiful diversity of mental happenings—he will value this work and study it assiduously.2

Vienna, October 1931.