It's a shameless scarecrow anti-drugs book. It's not directed to actual teenagers, but to parents who don't know how to talk about drugs with their sons, and expect it to be some kind of deterrent. Teenagers are not stupid to believe the book, and that only if they actually bother to read it.
Talk to your kids instead of expecting a book to do it for you.
On top of it, it's also ridiculously bad written. It fails at its purpose, and at being a good read.
