A brief post on this topic. As I have been researching for my book (tentatively titled "Here I (Still) Stand" -- more about it later), I came across an excellent resource by Heinrich Schmid called "The Doctrinal Theology of the Evangelical Lutheran Church". Using source texts (Lutheran theologians closest to the time of the Reformation and not more than a generation or two removed from Luther), Heinrich assembled an incredibly thorough and well-documented Biblical defense of Lutheran teachings and excellent apologetics resource in the mid 19th century.
For those interest, it is available for free online in several places, including Project Wittenberg and Google Books. It is rather lengthy (over 700 pages), but well worth having on hand, especially as a Lutheran, should someone ask a question that you don't always know how to answer. Someone far more studied, learned and coherent than I has already done much of the work in compiling all the necessary resources into one easy-to-use source.
When discussing theology, I've come to realize that not only is personal study of doctrine a necessary component to faith, but it is something that shouldn't be kept to oneself. I want to share my journey, both past and ongoing, into the realm of theology. Through this, I hope that you will gain insight into the Christian faith as a whole. Before reading anything else, I suggest you read the introduction and definitions (found in the pages tabs above) so you may better understand where I am coming from in everything I write. Because many of my posts are on heresies, there is also a page above with a family tree of heresies and links to all the posts I have so far on the topic.