Fractured Ground: Preaching in the Wake of Mass Trauma, Kimberly R.Wagner, Louisville, KY: Westminster John Knox Press, 2023 (ISBN 978‐0664267841), 183 pp., Pb $31.39

Chapter 5 is the culmination of Khouri's argument-a contemporary Christian answer to Islamic objections against the Trinity.Khouri begins by exploring the Christian understanding of God as the greatest conceived being.To be the greatest, God must be relational-and eternally so, or else the first premise fails.Khouri contrasts Islamic explanations of divine relationality, finding fault in the Islamic doctrine of transcendence and separation from creation.The Islamic understanding of Allah is argued to be contingently relational, whilst the Christian conception of God is held to be eternally relational, and so superior.The conclusion revisits and summarizes the main arguments of the book.Khouri makes several appeals: that we remember God is relational; that when Christians think of God, they think of the Trinity; and that Muslims and Christians continue to meet and debate their differing understandings of the divine.She also asks that the topic of commending Christian doctrine in an Islamic environment is further explored for at least three reasons.First, to develop further our understanding of how Muhammad understood the Trinity, which makes discussion and teaching on topics such as Jesus' nature and miracles in the Qur'an more accessible.Second, the better our understanding of the history of Christianity in the Arabian Peninsula, the more we understand about the historical Muhammad.Third, this enhancement could encourage excavation work, which would enable the truth of claim and counter claim to be assessed objectively.Most of all, Khouri wants the conversation to continue.Triune Relationality is a demanding and technical read, but it rewards perseverance.Khouri is in full command of her subject and writes lucidly and accessibly.This book is not for beginners in Christian-Muslim relations, but for those with the preparation and interest, Khouri is a skilled guide, and it well repays the investment of time and energy in understanding it.Highly recommended.