CLP uses extensive research and quotations from the sources to show similarities and differences among three major Christian confessions: Roman Catholicism, Lutheranism, and Protestantism. CLP was written for Lutheran/Catholic couples but has also been used for adult Bible study and confirmation classes. CLP is not polemical and seeks to create understanding among the three main Christian confessions of faith. The author is a Lutheran pastor with a PhD in theology from Notre Dame and a master's degree in Biblical studies from Yale University. He has attended lectures and conferences where many of the leading Protestants have spoken, including Billy Graham, Pat Robertson, and D. James Kennedy.