Seconding the library genesis recommendation. There's a lot of people now mirroring those files, and uploading there will make those books easier to find for a wider audience than just the eye.
https://www.vice.com/en_us/article/pa7jxb/archivists-are-try...
We (the-eye, like minds on reddit) are making sure libgen stays available. Further reading in a sub reddit I moderate here...
https://www.reddit.com/r/DataHoarder/comments/ed9byj/library...