I just finished The Other Olympians by Michael Waters. Subtitle: Fascism, Queerness, and the Making of Modern Sports
This book takes you back to the early 1900s and follows the story of trans men who competed in women's international sports as women. You get to see the shitbaggery intersection of Nazi germany & fascism, the International Olympic Committee, and how a bunch of men coopted an international womens league under the IOC.
Then made up a bunch of rules about sex testing to keep "men" out of women's sports with no sound basis (Could women shave and compete? Could "masculine" looking women compete? What about the XY combination that women are born with but present no genetic advantage?), which leads us to the current debate of women's sports, sex/gender, and trans rights. Allegedly, nobody remembers how sex testing started, but this book chronicled it pretty well.
They do not omit discussing all the harm done to both the trans men and cis women...