Group behaviour, boys and their cliques in school

Via the Twelfth Down Under Feminist Carnival, I've just been reading Andragy: CyberBullying, Feminism, Mean Girls, Queen Bees and Boys, and from there, the bit of Queen Bees and Wannabes that's online at Amazon.

Andra says of Wiseman's book:

I think that Queen Bees is a fine piece of feminist analysis, with racial and sexual prejudices opened up as well. Wiseman points out that she works equally with boys and girls, and that society's definition of masculinity influences boys away from strength, individuality and towards violence, bullying and groups in the same way that definitions of femininity trap girls.

I'd love to read a similar book about boys (though I note from the TOC of Queen Bees that there is a chapter on boys, and I have requested it from my local library). I do feel that ever since Liam began school the influence towards violence and group behaviour has certainly been growing.

He still does plenty of lovely creative play,* plays with girls as well as boys and so on. And I love his teacher and think she is working really well with them to teach them to be courteous, that making sure everyone gets a go is more important than winning a game etc. But the cliques seem to be forming, the popular children and less popular children are finding their places.

And I am starting to feel that I need more information. Liam is a boy, which I plainly am not. And also, he seems to be quite popular. Which, it might surprise you to know, I already was not by his age. I wasn't the lowest of the low at any time, but I was below the middle, right through until the end of year 10.**

So I'm not entirely sure how to teach him to - well, to be nice. To not fall in with group behaviour which is mean to others. To stick up for children who need support. Andra quotes Wiseman:

Boys and men who speak out against sexism or publicly support girls and women run the risk of being ridiculed by their peers as "fags", "sissies", "pussies" or in some circles "sensitive new age guys".

This is the sort of message I am afraid Liam might be picking up from his friend 'Craig'. That being kind, wearing a beany, playing co-operatively etc might may him some kind of 'sissy' (a word I would hope he's never heard, but I'm probably kidding myself), and that there's something wrong with that.

Any book recommendations for me?
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*Am I showing my biases here?
** Year 11 & 12 is at a different school in Canberra, and quite a different experience - for which I was extremely grateful.