So we visited Rainer tonight. This visit was somewhat unusual because two people joined me, a couple. The girl was enchanted by the way Rainer kneaded my leg. Then the guy came closer and Rainer's whole body stiffened. He made a huffing sound and I thought: uh-oh. But then I massaged Rainer's side and face and he purred and I thought everything would be okay.
Then the guy stuck his hand into Rainer's face and Rainer took a quick swipe with his claws in the guy's direction. He didn't make contact, but the clear message was: back off. I gently suggested that the guy shouldn't approach Rainer from the front, but rather from the side. Looking back, though, I'm not sure it would have made a difference, because all the relaxation had drained from Rainer's body. He was definitely on guard.
So then the guy stuck his hand in Rainer's face again and Rainer jumped off my lap and hid behind a chair. I couldn't get him to come out again. His green eyes had this vague faraway look that they get when he retreats into himself.
I did pat the other bookstore cat, however. His name is Hayes (after the former president, Rutherford B. Hayes. Both cats have high-falutin names ;) Hayes was amenable to patting. I noticed that Rainer likes to stay on the floor, while Hayes sprawls out over the books on the display table.
So the evening was a bit suboptimal. But I have faith that Rainer and I can have quiet one-on-one time during my next visit, without intruders :)