Histoire de la prostitution chez tous les peuples du monde depuis l'antiquité la plus reculée jusqu'a nos jours, par Paul Dufour. 6 vols.

Dufour was a pseudonym of the writer Paul Lacroix. Translated into English by Samuel Putnam as History of prostitution among all the peoples of the world, from the most remote antiquity to the present day, 3 vols., Chicago: Pascal Covici, 1926, Revised edition,  New York: Coivici, Friede,  2 vols, c.1931. Digital facsimile of the 6 vol. original edition from BnF Gallica at this link.