I don’t see any twin studies on your list of recommended books. I’ve enjoyed a couple of them. I think the average reader will find such studies very compelling — because twins are so real and concrete.
I haven’t surveyed the field, but I did thoroughly enjoy these two:
Twins: and what they tell us about who we are, but Lawrence Wright and
Entwined Lives: Twins and what they tell us about human behavior, by Nancy Segal.