In conjunction with @deandddd's recent book share and urging that we should be downloading all of the books that may seem important to us, I would like to add a word of warning that someone shared with me recently:
They are mass censoring ARCHIVE.ORG – I urge YOU to PLEASE download all videos and PDFs and material that you find on Archive.org – BECAUSE YOU DON’T KNOW HOW LONG IT WILL BE THERE. THEY ARE MASS CENSORING IT. I also tried to even open a new account on archive.org to upload, and I find that on all my accounts I am blocked from uploading. SO BE AWARE, they are killing off Archive.org. You cannot rely on it any more. So grab whatever you can and save copies of it so we can share it with each other independently.