The author has no clue about biology

Cordelia Fine gives a detailed account on how social environments may shape "gender" differences.

However, she is biased and hasn't a clue about biology. While the point of the book is not about the mechanism of sex differences or the lack thereof, but to argue "spurious results, poor methodologies and untested assumptions mean we don’t yet know whether, on average, males and females are born differently", the author has shown a tendency to suggest that sex differences are not based on biology, which is a logical fallacy and gives this book a strong political vibe.

P.S. I used to think this book highly. Since then I've read a lot more and my view on this subject has dramatically changed.