“The Color Purple ” by Alice Walker (Mariner, 304 pp.) is one woman’s journey from degradation to empowerment. Abused by her father, and later her husband (Mister,) Celie looks to her sister Nettie as a source of love and support. For years Celie doesn’t hear from Nettie – until the day that she discovers Mister’s stockpile of her sister’s letters. The rage Celie feels at this revelation convinces her to take back her happiness and life.