I really want to read The Seven Daughters of Eve: The Science That Reveals Our Genetic Ancestry now!
I always wish that I could write an amazing review, but it never seems to work out that way.
The first 6 chapters (aside from chapter one, which was about the author's Y chromosome and family history - to show were his interest came from, I suppose) are about basic genetics.
Chapter 7 was about other animals and how they 'decide' sex. One example given is a fish that can change it's sex. They live in harems with only one male, if that male dies one of the females will become a male over the next week. A worm that becomes male if it is exposed to a hormone a female puts out in order to find a mate. Turtles and alligators sex is decided by the temperature and it is thought that dinosaurs might have had a similar set up.
Chapter 8 explains why animals bother with sex at all (basically to say ahead of parasites).
Chapter 9 explains altruism in a genetic sense, which I already knew.
(Stopped review on chapter 10!)