An uneven collection of essays, the loose connecting thread is rituals that girls go through. These are organized into two parts, the parent approved part, and the non-parent-approved part. In tone, these are very odd, primarily pseudo-ethnographical, but with a large dose of personal experience and judgement thrown in.
Of these, I found the section on sororities, debutantes, and Burning Man the most interesting and best conceived. In each of these three, the author herself is involved in the ritual, and so is more honest about her own thoughts and feelings about them. Admittedly, these can come off as rather dated now, such as toward the end of the section on sororities, where she first describes how instead of being focused on inclusion and support (her experience of sororities), her friend group cohesion relies on excluding others. Then, she muses on how having been in a sorority or not having been in a sorority is an arbitrary distinction that should not divide people, and includes a list of other seeming opposites to illustrate her point, such as being a cat person or a dog person, or being a Democrat or a Republican. In the other sections of the book, the author adopts an odd, attempted objective tone that comes off as rather stuck-up (at best), and rather racist (at worst).
If you are interested in this author's books, I would recommend at least dipping into this one. It provides some insights into the author's life, some aspects of which turn up in other of her books (like the Swedish mother in We Run the Tides).