This is just another stat request.

There are books I saw in my shelf that only me have it. They are marked with (1). I am just wondering if I could know I am the only owner to how many books?

It's only a kind of self-satisfaction. : )
Think it souldn't be hard to add right?

Of course I can count it myself, but that will take me ages to do...

I would be more than a little interested in this myself.

The clock is ticking, the number of [the only owner] in my book shelf should be decreasing... may be this is why it's hard for programming. Am I correct?