I was trying to find out if any product that was legal can bridge that gap other than buying books in print, in bulk, and scanning them and destroying them. From the responses here, it sounds like the answer is a vehement "no".
Wasn't asking for advice on copyright, but since we're here, your statement is slightly too strict, at least with respect to US copyright law. The copyright holder has sole distribution authority over the first sale of the work in the United States, but thereafter the first-sale doctrine allows it to be distributed by anyone thereafter. It is limited to the US, though, as far as I know. This is what allowed anthropic to train on printed books, which they then destroyed: they were able to purchase them in bulk because of the first-sale doctrine, as the publishers and authors would likely try to destroy the first-sale doctrine if they could, as evidenced by what's happened in the world of digital books.
Wasn't asking for advice on copyright, but since we're here, your statement is slightly too strict, at least with respect to US copyright law. The copyright holder has sole distribution authority over the first sale of the work in the United States, but thereafter the first-sale doctrine allows it to be distributed by anyone thereafter. It is limited to the US, though, as far as I know. This is what allowed anthropic to train on printed books, which they then destroyed: they were able to purchase them in bulk because of the first-sale doctrine, as the publishers and authors would likely try to destroy the first-sale doctrine if they could, as evidenced by what's happened in the world of digital books.