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I have. Although I'm a huge Warhol fan, I wouldn't suggest reading it. It literally is a dairy, and just explains what he did on a day to day basis. It's funny, as it's very Warhol, and very dry. Sometimes he just puts "took a cab ride $4" and that would be his entry for the day.
It's one of those books that you can't read the whole way through, and I for one thought it would be much more interesting. There are some neat stories about him hanging out with celebs, but they are few and far between.
I suggest, "The Philosophy of Andy Warhol". That's written by him as well, but far more interesting.