Sunstone,
I suspect that when I (or you) were given such a book at 21 we would have had the same reaction. Slightly less than positive.
I had a friend who used to give electric toothbrushes as a present.
Long term benefits for the recipients.
Short term negative vibes from the recipients.
Twenty years ago, I was a conformed smoker. I knew it was bad for me. I knew I shouldn't do it. But it felt good- well, maybe not- but I really need that cigarette when I started the day.
Intellectually, it was bad. But I still did it.
I needed something other than the "smoking kills" approach.
I just decided one morning that I didn't need that ciggie.
That was 15 years ago.
It was a hard road. Five years afterward, I was still having dreams that I was smoking again.
But the incentive to give up had to be from myself. I could not be motivated by anything anyone else told me.
No books, ideas, horror campaigns... it had to come from inside.
Sunstone, I'd continue to give the book. But only together with something else which had a much higher perceived benefit. (toasters etc).