The Killer Inside Me by Jim Thompson:
It was around nine o’clock in the morning. By rights, I should have been headed for the courthouse. But I wasn’t knocking myself out, these days, to get downtown; and Dad had always laid himself out for any doctors that came around.
“I’ve thought about selling it, off and on,” I said, “but that’s about as far as it’s gone. I’ve never taken any steps in that direction. But come in, anyway. Doctors are always welcome in this house.”