I finally realized I could look at my books on Apple's bookstore by checking iTunes. (I only have two up so far.) I was pleased to see that Isn't It Romantic? has 743 ratings, but since it's free, I wasn't terribly shocked. I was startled, however, to see that All I Ever Wanted has 50 ratings. On B&N, one doesn't get a lot of ratings compared to sales. It makes me wonder if AIEW is selling like gangbusters over there, or if iBooks just get a lot more ratings for some reason.
In any event, I need to get the rest of my books up over there, as they are clearly selling to some degree, at least!