In From Pentecost to the Triune God Steven Studebaker puts forth a provocative Pentecostal Trinitarian theology, arguing that the Holy Spirit completes the fellowship of the triune God and therefore shapes the identities of the Father and the Son. The Holy Spirit, Studebaker maintains, is not simply a passive end-product of a procession from the Father and Son but, rather, a dynamic person who plays an active role in the Trinity and a constitutional, consummational role in the history of redemption. In the course of his study, Studebaker shows the theological yield of the Pentecostal experience of the Holy Spirit and uncovers the biblical narratives of the Spirit from creation to Pentecost. A constructive and ecumenical contribution to Trinitarian theology, From Pentecost to the Triune God also engages major historical and contemporary figures such as Augustine, the Cappadocians, Weinandy, and Zizioulas, as well as representatives from the evangelical and charismatic traditions. Finally, Studebaker applies his Pentecostal Trinitarian theology to the theology of religions and creation care, proposing that Christians embrace an inclusive posture toward people of other religious traditions and have an earth orientation that sees creation care as Christian formation.