Oh, also? Occasionally, an author has a copy Right There to sell. It's really great being able to buy the book from the author.

At GenCon, a friend of mine was talking about how he'd actually published a lot of fiction, as in books, as in stuff that, while gaming fiction, wasn't rpgs. So, I said, "Okay, where do I find it? I'll put my money where my mouth was." In answer, he took me to the White Wolf booth and pointed to a couple of novels he'd written for some iteration of the Vampire rpg, and I bought them.

Oh, that's another reason for the question -- so, you're Right There. How close is the nearest copy of the book for sale? Close enough I can buy it and run over to you for an autograph?

Or do you get asked via email?

Another possibility: Folks may think your stuff is hard to find and / or out of print.