Using a similar method to Kennard's biblical theology of Jesus, Hebrews, and Isaiah, Kennard's Petrine Theology makes contributions to Peter's theology, including: Peter's Jewish heritage, bridging from Jesus to Paul, expressing compatible sovereignty and free will, high Christology, missional Trinity, Hebraic anthropology, Jewish atonement, redemption and new exodus, gospel as allegiance to Christ, contextual sociological ecclesiology, suffering and spiritual warfare in a narrow virtuous way to kingdom, and nuanced consistent eschatology. The companion volume, Petrine Studies, fills out background issues, narrative biographical theology, and practical life concerns from Mark. Following a combination of Mark, Peter's sermons in Acts and Petrine epistles, Gene Green claims that Petrine theology makes unique contributions to Christian theology. Pheme Perkins concurs, ""Peter is the universal 'foundation ' for all the churches . . . There is no figure who compasses more of that diversity than Peter."" F. J.