This was very fascinating. I enjoyed reading about earlier feminism. WMM was definitely ahead of his time (but also had his issues). This was really, really well researched, so it came off as a bit dry for me so I read small portions at a time.
One thing I found fascinating were the relationships Elizabeth, Olive, Marjorie, and William all had with each other. After Marston died, the women continued their relationship/friendship. I thought it was interesting the amount of secrecy. The author made a point of pointing out that each child had a different POV.
This is most definitely a story of how Wonder Woman began and all the amazing women that inspired her creation. But it's also a story of family.