This is a perfect example of an "evil" pdf. It's not a good book at any resolution, too long lines and small type.
Without reflowing or re-creating the pdf, the most you can do is cropping it, I suggest:
$ pdftk file.pdf output file-unc.pdf uncompress
Edit file-unc.pdf, replace every instance of "/MediaBox [0 0 612 792]" with "/MediaBox [70 52 542 742]".
$ pdftk file-unc.pdf output file.pdf compress
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