"... and we couldn't help but wonder: if you were (or are) on the market, which book would you bring to introduce yourself? And which book, in the hands of the person across the table, would have you wincing and hoping for the next rotation to happen quickly?"
I'd bring "Get Me a Table Without Flies, Harry."
As for the books that would be off-putting in the other person's hands... there are so many things. The first thing that pops into my head is: astrology. But you don't need to go to a special library-sponsored book-in-hand dating event for would-be suitors to disqualify themselves with astrology.