The Sex Worship and Symbolism of Primitive Races / An Interpretation

The Biology, Physiology and Sociology of Reproduction / Also Sexual Hygiene with Special Reference to the Male

Text Book of Biology, Part 1: Vertebrata

Sex in Education / or, A Fair Chance for Girls

Five Stages of Greek Religion

Sane Sex Life and Sane Sex Living / Some Things That All Sane People Ought to Know About Sex Nature and Sex Functioning; Its Place in the Economy of Life, Its Proper Training and Righteous Exercise

Religion and Lust / or, The Psychical Correlation of Religious Emotion and Sexual Desire

Studies in Forensic Psychiatry

The Sex Side of Life / An Explanation for Young People

Sex = Love, And its Place in a Free Society

The Physiology of Marriage, Complete