How many books on Amazon?

I wondering – does anyone know? Seriously. I’d like to know.

Why? Well, my book (see right) is currently ranked 774,968 on the sales list. Does that mean there are only 774,967 books that are selling better than mine? (It does mean that at least one has been sold through Amazon!)

I’m just wondering how many books there are out there that I’m beating – at least 1 or 2, right?