Wow ... just wow. Now a lifelong mystery of mine has been solved in that very astute little blurb. When I was young, about 8 or 9, I loved Harriet the Spy. In fact I made it my birthday book and gave the school library $20 bucks of my own money to get my name forever sticker-ed inside it's covers.
I just thought it was so important that everyone needed to read it. However no one else seemed to take to it like I did. Like the article above said, it was the first book I read in which the heroine openly defied her parents, her school, and the established system. This was obviously in the eighties and not the sixties but I was so controlled and restrained that any rebellion in thought, word or deed seemed like a super power. Just because she was brave enough to have the urge to be different and than actually go about doing it. The cross dressing was a small part and I believe she got in trouble at one point for not dressing like a girl but she didn't let it bother her.
Now I want to read it again. So good. Thanks for posting this and reminding me.