Book Case Treasures

First off, we have a few things to get out of the way:

Yes there are a lot of bookcases in here.

We have WAY outgrown our home. We have one room to live in. It has four walls: three have doorways or walkways, one has windows and three have bookcases. Bookcases are our friends.

The bookcases are cheap, dont match, need to be smooshed together in places and there are people everywhere. Even when Im trying to take pictures.

I dust, I decorate, I clean these babies way too often and there are ALWAYS treasures waiting for me, like these today:

WHY? How does it happen? How do things get behind books? On top of books? Where do all the "extra" books come from that appear in stacks?

Does this happen to anyone else?