We have my parents set of encyclopedias. We’ve moved those heavy books, several times.
It was quite an investment, for them, I remember.
They have been used, over and over, through the years. I plan to keep them for my grandkids, who otherwise will have a hard time reading REAL history :-(
I’ve kept many of our old text books, as well. For that same reason.
I have saved old history books which I passed on to my daughter who was home schooling the grands.
I hope she has saved them to pass on.
The new history books, used at schools, are garbage.