I loved this book. It really helped me undertand a)what mt preteen is going through, b)why for one week (each month) I'm extremely communicative and for another week I can't string a sentance together. I was really surprised by the negative reviews written here. I've recommended this book to all my girlfriends. I'm thrilled with it. It is difficult to find a brain-book that the non-medical community can understand and enjoy. It's a little dramatized with the narrative, but it has a ton of relevent information. I dog-eared about 50 pages.