Amid the silly celebrity tell-all books comes one that promises a more valuable lesson: "Rock What You've Got," by Katherine Schwarzenegger. The book, due out Tuesday, is the first by the daughter of action-star-turned- California-Gov. Arnold Schwarzenegger and Maria Shriver. She hopes to encourage young girls to avoid an unhealthy fixation on their weight and looks.

"I want girls to read this and feel that it's OK to be themselves -- and to understand that every girl can be beautiful no matter what size and shape she is," she said in a news release about the book. "You don't have to look like you're on a billboard to feel beautiful. I really wanted to correct girls' perception of that."

I like that message, even though I cringe whenever it's delivered by those who grew up with the benefits of money, privilege and good genes. Still, there's no doubting that all kids feel pressured from peers and society -- no matter how rich or poor. The University of Southern California junior also promises to provide an inside look at her own upbringing, including her sense of awkwardness among the Kennedys -- her mother's side of the family.

"I never thought I would write a book," she said in the release. "But my fuel came from research and information on the growing number of girls who feel so much pressure to be thin -- and how young all of this is starting. My goal is to let girls know they're not alone when they're going through this and to spread the word about what young girls are going through today. Society needs to know about the kind of pressure that is put on girls. We have to change it in some way."