On Hebrews, Mike recommends the commentaries by John Calvin and Luke Timothy Johnson. He would also recommend Ernst Kasemann’s Wandering People of God and a collection of essays titled Epistle to the Hebrews and Christian Theology.
Nate recommends the volume on Hebrews in the Tyndale New Testament Commentary series, as well as the volume by F. F. Bruce in the New International Commentary series. The volume in the NIV Application Commentary series by George Guthrie is helpful for thinking about contemporary relevance. It also worth reading the entry on Hebrews in A Biblical-Theological Introduction to the New Testament: The Gospel Realized.
