A Book That Is Ostensibly Not About Hebrews Is About Hebrews?

Gregory W. Lee has a new book entitled, Today When You Hear His Voice: Scripture, the Covenants, and the People of God. The title gives no overt clue that the book has anything to do with Hebrews (the title does allude to Psalm 95:7, which is quoted in Hebrews 3:7 and 3:15). But according to this Eerdword blog post, Lee focuses his book on Hebrews and its use of the OT. The Eerdmans website gives the following description of the book:

"Presents a doctrine of Scripture based on Hebrews in dialogue with Augustine and Calvin

What vision of biblical authority arises from Scripture's own use of Scripture? This question has received surprisingly little attention from theologians seeking to develop a comprehensive doctrine of Scripture. Today When You Hear His Voice by Gregory W. Lee fills this gap by listening carefully to the Epistle to the Hebrews.

Lee illuminates the unique way that Hebrews appropriates Old Testament texts as he considers the theological relationship between salvation history and scriptural interpretation. He illustrates these dynamics through extended treatments of Augustine and Calvin, whose contrasting perspectives on the covenants, Israel, and the literal and figural senses provide theological categories for appreciating how Hebrews innovatively presents Scripture as God's direct address in the contemporary moment."