I have cheap paperbacks from the 1960's and 70's I bought at a second hand bookstore in the 90's on my shelf.
They are fragile and yellow but still sticking together on my shelves and for when I want to reread them. It helps that I live in a region with low humidity.
Hell I gave a few books I inherited from my great-grandmother from 1910-1920. They were on decent paper but not the best quality.
Most of my cookbooks are 40-50 years old now and they are pretty beat up but still in reasonable condition.