As Eisenhower said to the press when the full extent of the death camps became known, "Take pictures of all of this, because in 50 years they'll be denying it ever happened."
Buy the physical books.
“ That’s why we need to buy and keep books on this subject.”
I’ve been doing this since Covid hit, including some classics. I plan to pass them on to my grandchildren. With digital books, select words can be changed or subjects disappeared with a computer program. At least in the book “1984”, Winston Smith had to sit at a desk and make changes by hand in the books when the enemy of the day switched.