The Color Purple by Alice Walker

Celie, a poor African-American girl, lives in rural Georgia in the early 1900s. She writes letters to God because her father Alphonso beats and rapes her. Due to the rape, she gives birth to two children, Olivia and Adam, whom Alphonso takes away. A farmer identified as "Mister" (Mr. __) asks to marry her younger sister Nettie, but Alphonso offers him Celie instead. Celie is abused by Mister and mistreated by his prior children. Nettie runs away and stays with Celie, but Mister eventually makes her leave after she refuses his unwanted sexual advances. Nettie promises to write, but Celie never receives any letters, and Celie concludes that she is dead.