Many observers greeted the Second Vatican Council (1962-65) as the most important religious event in the twentieth century. Its implementation and impact are still being felt in the Catholic Church, the wider Christian world, and beyond. One sea change that Vatican II brought concerned RomanCatholic attitudes towards Judaism, Islam, and other religions. Gerald O'Collins breaks fresh ground by examining in detail five documents from the Council which embodied a new mind set about other religious faiths and mandated changes that quickly led to international and national dialogues betweenthe Catholic Church and the followers of non-Christian religions. The book also includes chapters on the insights that prepared the way for the re-thinking expressed by Vatican II, and on the follow-up to the Council's teaching found in the work of Pope John Paul II and Jacques Dupuis. O'Collins ably illustrates how the Council made a startling advance in officialCatholic teaching about followers of other living faiths. Carefully researched, the book is written in the clear, accessible style that readers of previous works by O'Collins will recognize.