And when I did run out of space in the past, it was easily remedied by adding more shelves. That's probably no longer feasible at this point, so from here I will start properly organizing the various other things cluttering up my other shelves, and likely getting rid of them. Things like useless old CDs, notebooks, textbooks, etc. That will free up some more space for the much more important books. And beyond that, I dunno. Buy a larger house?

But in all seriousness, I would hate to get rid of any of my books, or to banish them to some box and closet. Fortunately, I've gotten over my book buying obsession, mostly because I now have far more books than I have time to read, and it is hard to justify additional purchases in such circumstances.