I am looking for a book

The Book

The Book is about a girl who has a step family can't remember none of the names. That is the bad part. She works at a diner and they call her diner girl. I think she ends up losing a converse shoe that she has designed. Someone she knows is in the hospital. The guy is a jerk to her at first but ends up asking her for help to find his lady. That is all that I can remember.