The Color Purple by Alice Walker

Celie has grown up poor in rural Georgia, despised by the society around her and abused by her own family. She strives to protect her sister, Nettie, from a similar fate, and while Nettie escapes to a new life as a missionary in Africa, Celie is left behind without her best friend and confidante, married off to an older suitor, and sentenced to a life alone with a harsh and brutal husband.
 
In an attempt to transcend a life that often seems too much to bear, Celie begins writing letters directly to God. The letters, spanning twenty years, record a journey of self-discovery and empowerment guided by the light of a few strong women. She meets Shug Avery, her husband’s mistress and a jazz singer with a zest for life, and her stepson’s wife, Sophia, who challenges her to fight for independence. And though the many letters from Celie’s sister are hidden by her husband, Nettie’s unwavering support will prove to be the most breathtaking of all.