She wouldn't talk about the book? Are you sure she wasn't an alien
Really, most readers would be thrilled that someone was interested in the book they're reading. I'm usually so happy to find a fellow book lover, I don't mind the interruption. Her loss...
Well, if you watch booknotes on C-SPAN, then I will submit to anyone the title of King Nerd and hand over the pocket protector and roll of tape for the middle part of your glasses.
When you have not finished 1 book and have 12 more waiting in the wings and you are ordering more,
When you see a perfect stranger reading a book in a public place, and you make a fool out of yourself trying to see what it is.