Sex at Dawn is an excellent book - the Dusk one is yet another bit of Western pearl clutching about the proof that monogamy is a really recent human development. It talks about gene propogation in a way that is too reductive for human mating. The critiques of it Dawn don't meaningfully address the cultural examples of sexual non-monogamy throughout the world. They address the premise because it feels uncomfortable.
Neo-Liberal Genetics by Susan McKinnon talks a lot about different sexual mores in other cultures. Hoping to write a survey piece on that very soon. For a quick and easy read, here are a couple of things I've written on the topic as well - they all reference experts and other works.