Senator Joseph Biden Book reading at the Philly Main Library, but who is his audience?

I just received this in my email: Coming to the Free Library of Philadelphia

Just Added!
Senator Joseph Biden
Promises to Keep
Monday, August 27 (12 noon) FREE

Let’s see who can make it over to the library for a noon book reading… the employees of Family Court, the homeless hanging in the Shakespeare Park and I guess the folks who drive in from the suburbs who work at Logan Square. OK I am just jealous, I can’t make it in on my lunch hour to hear him put his foot in his mouth, like I know he will! Would it have been to hard for him to come up for a night time reading?