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They explicitly provide that data for you to do as you wish. They are in a grey area, not you. You can download it no problem.

is there legal precedent for that?

already asked LLMs so please don't copy/paste an LLM response.

Depends on your jurisdiction.

Sorry, I misunderstood your question.

Seeing as nobody has provided a real answer. The question is, maybe.

Anna's Archive is getting sued currently for scraping vast amounts of essentially public metadata which was being gate-keeped by a single organisation.

Here's the longer and more complicated answer for you:

https://libraries.emory.edu/research/copyright/copyright-dat...

feist is what comes up when i search around, too. the ISBNs might be poisoned if anna broke terms of service to get the ISBNs