I came across a mention of this book by Michelle Langley on Women's Infidelity.

https://www.counter-currents.com/2011/06/rotating-polyandry-and-its-enforcers-part-1/

I found a discussion about it on /r/PurplePillDebate:

https://www.google.co.uk/amp/s/amp.reddit.com/r/PurplePillDebate/comments/3fvnxc/michelle_langley_on_infidelity/#ampf=undefined

So has anyone read this book?

It seems not too far fetched, but is this book following RP theories? What are your thoughts on it, is the author respected etc?