There are many great figures in this dense book that lost me a few times. This is the last figure in the book. I read a review that said it's the kind of book you read a few times. To my chagrin I paid for it, not knowing you can get it for free. It's an interesting book from the Theravada perspective. Feels like a profound book that I will read again.
I also read recently and enjoyed First Buddhist Women which is a commentary on the Therigatha. Fascinating stuff. Getting to the root of Buddhism. Putting things in context. So two books that I recommend to support your Dharma study.