For 10 points, name this epistolary novel by Alice Walker.
The protagonist of this novel advises her stepson Harpo to beat his wife Sophia, then asks God for forgiveness. Although the protagonist of this novel is raped by her stepfather and married off to the abusive Albert, she overcomes adversity with the help of her husband's lover, Shug Avery, and her sister, Nettie. This novel's plot develops through a series of letters written to God by the protagonist, Celie. For 10 points, name this epistolary novel by Alice Walker.
The protagonist of this novel advises her stepson Harpo to beat his wife Sophia, then asks God for forgiveness.
The {Color Purple}