"Mission is handicapped without a sound biblical theology of mission and an understanding of the history of mission leading up to our current context. Constants in Context offers both of these elements. It is mission theology in historical perspective and/or a history of mission that is grounded theologically. The authors describe it as a systematic theology with mission at its core, and a church history shaped by the constant but always contextual Christian traditions. Furthermore it is a constructive contribution to how mission theology needs to be practical and lived out through today's church and in our world. Written collaboratively by Roman Catholic writers Stephen Bevans and Roger Schroeder, both Missionaries of the Divine Word (SVDs). It is a particularly insightful in regard to the history and the various streams of Catholic mission but it also addresses and learns from the other traditions of the church. In fact, one of the book's strengths is its attention to neglected aspects and hidden stories of church and mission history. As a result it is gratifying to be inspired by non-European mission, women in mission and various forgotten or often ignored branches of the church. The book is in three sections: first, there is a framework for cultural contexts and theological constants; second, an in-depth exploration of historical stages and different models for mission; and third, a presentation of theological frameworks for mission. The third section concludes with a case for 'mission as prophetic dialogue' being the most appropriate model for 21st century mission.