Though I personally prefer to read these sorts of books directly from pdf, and am grateful to them for sharing it on arxiv.
Also it should use LLMs and the blockchain.
But this would be nice there are a number of papers and such that if you could submit an arXiv link to a print service I would probably buy a copy. I wonder why no one does it.
This worked four years ago when the API was still launched, but there might have been changes since, so no guarantees.
Most ArXiv PDFs are probably lulu-printable out of the box, but to make a general solution, one would probably need to do some pre-processing with ghostscript (gs), e.g. embed all fonts and flatten images (no transparency).
Source: I did the course