Exploring Ecclesiology is true to its subtitle, being both vibrantly evangelical and admirably ecumenical; it is commendable for its depth, breadth, and erudition. Harper and Metzger's sympathetic engagement with Catholic ecclesiology is challenging and reciprocal. I especially appreciate how the authors emphasize and explore the vital connection between ecclesiology and eschatology, something very beneficial to readers seeking to better appreciate how living the Faith in community today relates to the hope of entering fully into Trinitarian communion in the life to come.