Humans are not just two binary genders and Ms. Harper does an excellent job of explaining that in this book. She also dives deeply into people who at birth are assigned the wrong sex for various reasons. While I knew much of this before, Ms. Harper gave more details and scientific information. This might be interesting to some people and maybe the book was not aimed for me as the audience, but it was well above my personal scientific abilities. (Chemistry and biology are not my forte.) But other than this, and a bit too much jumping around between different athlete's stories, the book was a terrific discussion regarding where these athletes fit, where they should fit, and how the sporting world has treated them in the past, present, and potentially the future. I appreciated that Ms. Harper questioned her own thinking during the journey and was willing to let the reader know she was undecided at points. If you have any interest in the world of sports or gender dynamics, this is a fascinating book!

Well researched and engaging, Harper does a good job of showing readers intersex and trans athletes don't just deserve a place in sport, they already have carved out one.

Interesting but gets bogged down in details

I enjoyed this book. It was informative and the science was well-explained, although that was only part of the book. I feel that author Joanna Harper tried to be objective and where she wasn’t, she was clear about giving her opinion. On the other hand, there was some speculation in the book and the book sometimes got bogged down in detail. Notwithstanding these items, the book gave me a much better understanding of sports and gender. This book covers somewhat the same territory as Alice Dreger’s “Galileo's Middle Finger” which I enjoyed more because of its greater emphasis on science.