I ran into a colleague on my way back from the engineering library this afternoon,
and we had a conversation that went something like this:
It's strange to see you carrying that book. I'd forgotten that I'd returned it to
the library, and I was used to seeing it on my shelf.
I figured that was where it was; I've been checking on and off for a while.
It has been on my shelf for three or four years. You should have told me!
Eh, wasn't that important. I have some books like that, too.