I've read a lot of books in my life that I said "Wow" about, but not many that I still say "Wow" about 20 years later.
People who don't realise that change is difficult will seek out books that promise merely reading something that hadn't known about before and simple attitude shifts will bring about change (hence the market for "The Secret" and its ilk).
I understand this because that was my default thinking too. In time, experience led me to identifying this hidden belief and challenging it. Then I stumbled on my #2 book which describes the model for change that I use: "Changing for Good" by Prochaska et al. Just as with "Feeling Good", there are so many pages I'd read and think "Ahh I know exactly when I fall into THAT trap".
I recommended it to my roommate a few years ago though, and I read it again after he was done and found it to be super cheesy and slightly pretentious. My roommate seemed to like it, but I don't know if I would really recommend it to a grown adult anymore.
Perhaps something about the economics of the drug trade, how the War on Drugs affects it, and some statistics on how effective the War on Drugs has been thus far (for starters).