People, Return My Stuff!

Something happened today that reminded me of the fact that this is something that annoys me. Actually, it's one of my pet peeves (the first being people that are consistently late).
People don't return my stuff.
I hope this doesn't sound too selfish. But I would like to make this point. I am being a kind and generous person, and lending something to someone. Then, that someone never returns it, and seems to either loose the item in question, or decide that the item is theirs. It's not theirs!
This mostly happens with books. A conversation would go like this:

Person: "Oh, yeah. I've heard that book is good."
Me: "I have a copy, do you want to borrow it?"
Person: "Oh my gosh, can I? I promise I'll give it back!"
Me: "Sure, I'll bring it tomorrow."

And there you go. I'll never get my book back. Ever. And they promised!! The sad thing is, I lend all of the good books out to people. I've lent out The Hunger Games, Mockingjay, Clan of the Cave Bear, and one of my favorites, Tales from Outer Suburbia. I've never gotten these back.
I even lent someone a calculator last year. She didn't have one for finals, and so I, being the prepared and kind person, lent her my calculator, and SHE NEVER GAVE IT BACK!!!!
This is very irritating to me.

Though, I have to say, the thing that reminded me of this fact, was that I actually got something of mine back today. Though I didn't lend it to anyone, because it would be weird to lend someone my brush. I left it at a friend's house, and it was returned to me today. YAY!!!