Pastor-theologian, Robert Letham, comes well prepared for his task, one which evangelicals have greatly neglected for many decades. With a Ph. D. from Aberdeen University in Scotland and full-time Presbyterian Pastorate, Letham approaches the Trinity with both a deep scholarly yet a very personal and pastoral approach. One of the most outstanding features is that Letham is both very thorough and discerning, yet at the same time gracious and as fair as is possible, as we shall see. Another excellent feature that he brings to the task is judicious biblical exegesis, which, unfortunately, is unusual for a book on the Trinity. The first large section of the volume (up to page 84) develops the incipient Trinitarianism in the Old Testament. Next, he analyzes Jesus’ relationship with the Father in the Johannine and Pauline writings. Last, he furnishes an excellent excursus on the “Ternary Patterns in Ephesians.”