Best Foot Forward, by Joan Bauer

If you loved Rules of the Road, read the sequel to find out what happens next!  Jenna grows even more into herself and comes to terms with some difficult personal issues.  She also develops her role at the shoe store and takes on more responsibility, encouraged by her boss and her coworkers.  I think Bauer does an excellent job at showing good business versus bad business, and the story is consistent from where it leaves off in Rules of the Road.  Again, I think this is a great book for girls (and boys!); it's a feel-good, fun read that also prods serious thinking about situations that many teenagers face, whether they work retail or not.