Curious as I am, I jumped straight to Chapter 15. I must say it's a tour de force of obfuscation and innuendo. Whatever one might think about who's right in these controversies (and I'm personally still not quite sure what to think), it doesn't even begin to address any of the concrete issues involved. On the whole, it's another awful ink cloud added to an area where it's already difficult enough to make sense of the existing literature.
Hopefully the articles about less charged issues are better, but I'm not at all optimistic after seeing this one -- and I'd consider it by itself enough to deny the "very good" designation to the book as a whole.
Bonus fun fact from chapter 3: "Persons with higher IQs apparently are also likely to be taller and have more body symmetry than persons with lower ability scores."
Health is healthier than sickness.
...and the theories of intelligence they use to measure 'intelligence'. Here, from the new (and very good) Cambridge Handbook of Intelligence.
Bonus fun fact from chapter 3: "Persons with higher IQs apparently are also likely to be taller and have more body symmetry than persons with lower ability scores." [Silventoinen et al. (2006); Prokosch & Miller (2006)]