Martin Luther's Theology: Its Historical and Systematic Development, by Bernhard Lohse
In an essay summarizing recent Finnish research on Luther, Tuomo Mannermaa posed the straightforward question, "Why is Luther so fascinating?" Because, he answered, "Luther still has something to teach us." Luther's thought, Mannermaa claimed, combines a much-discussed theology of the cross with an underappreciated theology of love and participation. These elements are made existentially relevant, he declared, by means of Luther's "central insight" that "in faith itself Christ is present."