My Soul to Keep: The Fellowship Dystopia Book One by Lynette M. Burrows.

She lives a charmed life—until she breaks the rules. But in this alternate 1961, following the rules isn’t optional. Before the Prophet, con men and thieves and murderers drove America into the Great Depression and to the brink of destruction. In those dark days, the Prophet brought the Fellowship and its Council forth to guide America out of the darkness. And under the rules of the Fellowship, America prospered. Miranda, the daughter of one of the Fellowship’s premier preacher-politicians, enjoys a life of privilege for nearly twenty-five years. But she is one of the elect and her time of independence is coming to an end. By Fellowship law, she must marry the man her parents choose. Live in his shadow. Be his perfect wife. Her life will never be her own. And she can’t—she won’t—live that way. She escapes. Creates a new identity. Lives a new life. A life on the run. But the world outside of the Fellowship is much darker and more dangerous than she knew. Then, a dead man puts her back in the hands of the tyrannical Fellowship. Re-education treatments meant to restore complete obedience, awaken dark memories. Memories of soul-shattering secrets. Secrets that could destroy her family. Secrets that could destroy the Fellowship. She vows to fight the tyrants, even if they are family, even if it costs her life.