The whole thing can be bought on paper for $32 (e.g. at Amazon), or, blessedly, downloaded for free from Library Genesis.
What is going on? The Eisenbrauns family business that originally published the book was bought out by Penn State University Press -- not Brill -- while the President and Fellows of Harvard University own the copyright -- so how can Brill pull off this scam?
If you know about the presumed deal allowing Brill to do this, I would appreciate learning about it.