Throughout this century the Letter of James has been viewed consistently as a disjointed set of instructions. Father Hartin deviates radically from this approach. He shows that the "call for perfection" provides a unifying meaning for the letter. Examining the concept of perfection against the background of the Greco-Roman world, the Old Testament, and the Septuagint, the author shows that perfection provides a key to define the spirituality of the Letter of James. It offers an understanding of God and of the way one is called "to be in the world." Hartin adopts a fresh approach toward understanding the categories of wisdom, eschatology, and apocalyptic as they illuminate the letter's advice.