What is the summary for Shell Shaker by LeAnne Howe?

Shell Shaker, by LeAnne Howe, tells the parallel story of two women's lives. The story follows the strange circumstances that similarly occur to two separate generations of the Billy family, who is part of the Choctaw Nation of Oklahoma. The first tale takes place in 1738 when a woman named Shakbatina sacrifices herself to save her murderous daughter, Anoleta, and to prevent a war from erupting with the Chickasaws. Two centuries later in 1991, Auda Billy is accused of murder. Much like Shakbatina sacrifices herself to save her daughter, Auda's mother, Susan, takes the blame for Auda and is tried for the murder. The story flashes back between 1738 and 1991 so that the reader can see the similarities between the lives of each of these families.