The third, fourth and fifth links came up as dead-ends for me, MA.
The first reviewer agrees with the premise of the book, and says:
The premise is... largely correct. Our species evolved to be promiscuous, and monogamous, heterosexual marriage is a social construct.
Using evidence from both anthropology and biology they make a convincing case that monogamous, heterosexual marriage is culturally specific.
I found the biological argument fascinating. Why do women take longer to achieve orgasm and why are they capable of multiple orgasms? The answer: because our distant female ancestors, like our bonobo and chimp cousins, mated with multiple male partners: a strategy designed to maximise the chance of conception.
I am more familiar with the evidence from anthropology. Much of this evidence has been suppressed in order to appease the delicate sensibilities of moral conservatives...
I do appreciate their argument that heterosexual monogamy is a fiction. I would add that it is largely a fiction of the Judeo-Christian tradition and a product of one cultural complex. It is most definitely NOT universal.
He then goes on to point out one instance where the authors seemed to have glossed over the practice of one tribe's insistence on wedding night gang-bangs as being detrimental to a young bride's health. Perhaps he had other objections. He does not list them.
The next working link, #6, is written by a woman who hasn't read the book, just a few excerpts. She has a degree in bio-physics, not anthropology.
Her premise is, primates, including humans, have varied sexual practices. This is not an earth shattering statement.
And this quote from her is just amusing:
...the number of orgasms women are able to have varies quite a bit, with some women so spent after one that they have no desire for another, some women enjoying repeat orgasms from prolonged sexual activity, and some going off like popcorn popping, even in short sexual encounters.
And her credentials:
Dr. Pisaster has a doctorate in biophysics, not actually anything sexy. She does however enjoy having sex, reading about sex, and talking about sex. Especially when she’s had a little whiskey.
Hmmm, not exactly a rigorous peer review.