Sex--The Unknown Quantity / The Spiritual Function of Sex

Studies in the Psychology of Sex, Volume 3 / Analysis of the Sexual Impulse; Love and Pain; The Sexual Impulse in Women

Sex-education / A series of lectures concerning knowledge of sex in its relation to human life

Applied Psychology: Driving Power of Thought / Being the Third in a Series of Twelve Volumes on the / Applications of Psychology to the Problems of Personal and / Business Efficiency

Power of Mental Imagery / Being the Fifth of a Series of Twelve Volumes on the / Applications of Psychology to the Problems of Personal and / Business Efficiency

Narcissism Book of Quotes

Married Life / The True Romance

Erotica Romana

Studies in the Psychology of Sex, Volume 1 / The Evolution of Modesty; The Phenomena of Sexual Periodicity; Auto-Erotism

Studies in the Psychology of Sex, Volume 4 / Sexual Selection In Man

The Development Psychology of Psychopathology