Studying Youth Gangs Book

I read several chapters from this and kind of wish I'd be assigned it again in the future. Lots of good, accessible information in a decently readable format with only a few--from what I saw or have the expertise to catch--errant or imprecise passages, specifically on the nature of personality disorders, wherein there was a mention that those with PDs do not experience rapid mood swings or struggle with mood dysregulation (those with BPD know otherwise), and when talking about gender identity, implying that gendered differences in behavior in children who are several years off from formal operations are innate, based in biology, rather than the product of socialization. In short, girls tend to choose the meeker and milder activities while the boys tend to choose the rough-and-tumble variety because that's what's socially encouraged, *not* because girls are naturally milder and boys wilder. It lacked a discussion on this, and since there were other areas of the book in which sociological contextualizations took place by which to frame psychological manifestations, I don't think the excuse that it's soc versus psych would hold much water.