What's sad is that I really should have known...
Patron: Do you have that new book about squash? Or maybe it's about a pumpkin?
Me: ...
...
Do you know anything else about it?
Patron: No.
...
Oh, well, they're reading it for the February book group at the Wells Library.
Me: Thanks. I'll just look that up for you. <Googling commences.>
Ah. ... Are you looking for The Guernsey Literary and Potato Peel Pie Society?
Patron: Yes, that's it!
Me: <gritting teeth> Oh, you're welcome. And I've got a copy right here. <sunny smile>