An Unquenchable ThirstAn Unquenchable Thirst is the story of Mary Johnson's twenty years as a Missionary of Charity working for Mother Teresa in service to the world's poor. It is a fascinating depiction of the daily struggle to live a life of religious service. At seventeen, Johnson experienced her calling when she saw a photo of Mother Teresa on the cover of Time magazine, and eighteen months later found herself in religious training in a South Bronx convent. Not without