I find with a lot of modern hardbacks, the binding is awful, and the pages start falling out very quickly. Older ones hold up better, or are at least easier to mend due to the older style of binding. Paperbacks seem to stay together regardless of age, although the covers are more fragile.
I have too many. They’re organised roughly by fiction and non fiction though, as I tend to read one of each at a time, so it’s easy to see what’s what.