Paris: Bibliothèque d'hygiène des deux sexes (1891). 117pp.
Essay on the causes and effects of homosexuality by the prolific doctor who wrote on a wide variety of related issues. The doctor also has helpful hints on curing such disorders, which include loose fitting clothing and not spending too much time in soft beds. The book went through several editions.
A good copy in worn wrappers, with loss to spine, small tears to edges.