The Dry Grass of August by Anna Jean Mayhew

Thirteen year old Jubie is the object of her Dad's fury and relies on the comfort of the families "girl", Mary.    Jubie's family thinks being nice to Mary, even providing an indoor bathroom "just for her", makes them superior to the racist world around them.  A disastrous trip through the south with Mary along highlights the horrors of the Jim Crow south in 1954.  With Jubie as the narrator we explore a society whose rules are just waiting for the clarity of youth to challenge them. This book doesn't have the heft of The Help but will appeal to the same readers.  Although this wasn't written for young adults, the youthfulness of the narrator and the content of the story makes it very appropriate for that age group.