We have a lot of our old HS history, English, etc books...as BOTH of our mom’s were book hoarders, I mean SAVERS!
I also have my grade school readers. Love those books.
Also, and the one I truly value, is an old set of encyclopedias....from pre-70’s. You can find REAL history in those volumes.
I wish I had kept my old encyclopedia set. I gave it away before one of my moves, and before I knew we were going to become Nazi Germany.