Mt. Carmel Ministries is located north of Alexandria, MN and offers online devotions and Bible studies, links to audio of lectures and sermons and opportunities for retreats at their center.
The Book of Concord is the second most important book for Lutherans. (The first being the Bible!) These are the Confessions of Luther and later Reformers that describe what they believe and why. At ordination, every pastor is asked if they will acknowledge that the Confessions are "a true witness and faithful exposition of the Holy Scripture," and if they will "teach in accordance with the Holy Scriptures, the creeds and confessions."