What are the differences between Lutherans and Calvinists, and do they really matter? In Wittenberg vs. Geneva, Brian Thomas provides a biblical defense of the key doctrines that have divided the Lutheran and Reformed traditions for nearly five centuries. It is especially written to help those who may have an interest in the Lutheran church, but are concerned that her stance on doctrines like predestination or the sacraments may not have biblical support. To get to the heart of the matter, Pastor Thomas focuses solely upon those crucial scriptural texts that have led Lutheran and Reformed scholars down different paths to disparate conclusions as he spars with popular Calvinist theologians from the past and the present.