Self Knowledge and Guide to Sex Instruction: Vital Facts of Life for All Ages

Geschlecht und Charakter: Eine prinzipielle Untersuchung

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

Sex problems of man in health and disease

The Kama Sutra of Vatsyayana Translated From the Sanscrit in Seven Parts With Preface, Introduction and Concluding Remarks

Hygiene des Geschlechtslebens

Sex-Love, and Its Place in a Free Society

De psychologie der sexen: De sexen in hare verhouding tot de maatschappij

The Sexes in Science and History An inquiry into the dogma of woman's inferiority to man

Aphrodisiacs and Anti-aphrodisiacs: Three Essays on the Powers of Reproduction

Essays in War-Time: Further Studies in the Task of Social Hygiene

Porneiopathology A Popular Treatise on Venereal and Other Diseases of the Male and Female Genital System; With Remarks on Impotence, Onanism, Sterility, Piles, and Gravel, and Prescriptions for Their Treatment