The Transsexual Phenomenon
The Transsexual Phenomenon is a medical textbook published by American endocrinologist and sexologist Harry Benjamin in 1966 with The Julian Press. The text is notable for its examination of transsexualism not as a psychological issue, but rather as a somatic disorder that should be treated through medicine.
Source: Wikipedia — The Transsexual Phenomenon (CC BY-SA 4.0)