Used paper books, especially poor-but-functional copies known as “reading copies” or “ex-library”, are going for a song on the used book market. Recommend starting your own physical book library, including basic reference texts, and supporting your local public and university libraries. Paper copies of articles in your areas of expertise and interest. Follow the ways of your ancestors.

I’ve had AIs outright lie about facts, and I’m glad to have had a physical library available to convince myself that I was correct, even if I couldn’t convince the AI of that in all cases.