Book excerpt: Hidden Histories 2 invites readers to enhance their knowledge of history as an important source of spiritual strength for these times. It also examines more deeply what it means for the United Church of Christ to celebrate its "unity in diversity." It explores such areas as Lutheran and Reformed Cooperation; German Evangelical Protestants; Origins of the Christian Denomination in New England; Evangelical Pietism and Biblical Criticism; Women's Mission Structures and the American Board; Religious Journalism; Philip William Otterbein and the United Brethren; From German Reformed Roots to the Churches of God; The Congregational Training School for Women; and Chinese Congregationalism.