The second in the triology goes inside the culture of the Pretty People and reveals more secrets about whoever the bad guys running the world are.  Good enough that I'm anxious to get my hands on the final book so I can find out what happens.  I think girls might enjoy this series more than boys, but you definitely don't have to be a young adult to get into it.  It's a fairly quick read too.  I finished it in about 4 hours.