Start with high-confidence 12 step programs books, then narrow by subgenre or adjacent topics.
In God's Care
Karen Casey, Homer Pyle
Daily Reflections
Alcoholics Anonymous World Services Inc., Alcoholics Anonymous
Recovery—the Sacred Art
Rabbi Rami Shapiro, Joan Borysenko PhD
A Woman's Way Through the Twelve Steps
Stephanie S. Covington PhD LCSW, Stephanie S. Covington
A Woman's Way Through the Twelve Steps Workbook
Stephanie S. Covington
The Little Red Book
Anonymous