“The night he died I was in a north London nightclub, where I took heroin for the first time. I returned to my south London flat the next morning, threw up, and went straight in to work, where someone immediately told me about his death.” This fragment, the 421st of the 450 that comprise Ian Penman’s engaging new book Fassbinder: Thousands of Mirrors, strikes me as something much more than a “where were you when…” sort of anecdote.