I've just read the beginning so far (and will unfortunately probably only get a chance to read bits at a time through the day today), but so far it's a really fascinating read. The Nietzsche/marginalism connection is interesting although of course by no means unique to Austrians. I'm anticipating that the latter portion on Nietzsche and Austrians "turning the market into the realm of great politics and morals" will be more convincing.
The expected set of people are crying bloody murder. That means one of two things: (1.) Robins has written something really bizarre, or (2.) Robins has written something very insightful and he's struck a nerve.
The former might be the case on the marginalism point although so far he doesn't seem to be claiming marginalism is just an Austrian thing. I'll let you know what I think on the rest of it later.