I have the annoying habit of not moving photos from my camera to my computer in a timely basis. As a result, when I import the photos into iPhoto, and it asks for an event or roll name, I usually don’t provide one, since there are normally a half-dozen or more “events” represented among the photos.
In any case, this particular photo dates from a trip to a discount bookstore about a month ago. I just thought it was an interesting category for the book to be filed under.