Are You there God? It's me, Margaret by Judy Bloom (1970)

Faced with the difficulties of growing up and choosing a religion, a twelve-year-old Margaret talks over her problems privately with God. Margaret's parents have no religion and are raising Margaret with none. Her father was born Jewish, her mother Christian and upon marrying they have forsaken both. The plot centers around Margaret's confusion about faith as she both longs for and fears physical development and growth. Blume writes openly about the physical manifestations of menstruation and puberty. Margaret is a strong-minded adolescent finding her way into adulthood. Controversial in its day for its straightforwardness. Ages: 9+