As I've mentioned, I'm an "author". And, insofar as it actually means anything, I'm a "publisher". Heck, I've got an ISBN registered to my name, so that's something.
One of the things that that registration means is that my book on people's radar as something they might want to buy or sell. Along with that, this means that I have a new email address that's getting brand new spam. Book-sales-specific spam, but unsolicited email just the same.
Just because I liked the idea of making a book doesn't mean I want to hear from your business, thank you very much.