Hi Def and all,
I'm wondering if perhaps you could just give her a book that validates her love of reading and doesn't carry with it any hint of selfhelp or any implication that she's needing it. That age is a really difficult time for many girls/women, because they are still mostly girls being faced with choices and long term consequences that propel them into womanhood. The lucky ones are directed, focused, motivated, and energetically going about all those developmental tasks that we need to achieve. Others take a while, sometimes a long while, to mature. How bout finding out what she likes to read and buying her something similar, whether it's fiction, humor, classics, etc. By reflecting what she likes, you really come in as the shining hero it sounds like you are!
That is always an option. That Fear of Flying book sounds like a fictional book, not so heavily on the self-help side of things. Even a book that just may inspire her or perhaps envolk some deeper thought.
For me, books like Catcher in the Rye, To Kill a Mockingbird, After the First Death, At Risk (seriously, I didn't think I was going to like that book as much as I did), these books were not just good, but sparked feelings, emotions, and thought processes that enlightened me. You know, books that move you.
Lord of the Rings and The Hobbit, or Tom Clancy novels are just for enjoyment purposes (although if you read between the lines of Tolkiens books, one can find deeper discusions, same for Harry Potter).
Then again, I am an easily moved person ;-)