What do you think of these books?

I've never read "Zero" but as far as "Fear and Loathing", Hunter S. Thompson is a genius as only drugged-up, madmen can be. I have never read anything that describes a drug-induced trip so well. Absolutely ingenious. Oh and "Catcher in the Rye." That's just my personal preference. However, I think you will enjoy both if you like Hunter S. Thompson. They both very much delve into the human psyche.