Yes! Exactly - I actually picked up textbooks in college my fellow classmates were throwing out as well. And Lordy keep me away from the library and university books sales....
I’ve built special hanging bookshelf on rollers to make the most of the wall space I’ve been allocated.
Even with all of that I still have about 10 boxes of books that I don’t have shelving for.
History books, Pre Howard Zin history books are good things to keep.