Biographical Sketch of the author: Dr. James Jacob Pursley, a native of Northwest Arkansas, has been a church planter in Turkey since 2002. He currently trains and mobilizes missionaries to enter the Muslim world from an undisclosed location. He holds a B.S., Pastoral Studies, Clarks Summit University, M.A.R., Reformed Theological Seminary, M.A. in Muslim Studies from the Zwemer Institute, and is currently a Ph.D. student at Columbia International University. His research topic focuses on discipleship approaches for believers from Muslim backgrounds. Abstract Samuel Paul Schlorff (1928-2015), was a missionary to the Muslim world, specifically in North Africa, and a scholar in the field of approaches to Islam. For many years Schlorff was a lone voice among Missiologists who wrote concerning the Muslim world. Schlorff’s perspective was unique, because he applied a biblical, and specifically Reformed approach to Muslim ministry. Although Schlorff did not call his approach to Muslims, “Reformed Presuppositionalism”, his proposed models for apologetics and discipleship of BMBs would be considered just this. This short article introduces the life, and some of the works of Samuel. P. Schlorff. Keywords: Samuel Paul Schlorff, Arab World Mission, Betrothal Model, Translational Model, Reformed Presuppositional Apologetics, Reformed Presuppositional Discipleship, BMB (Believer from a Muslim Background) The Legacy of Samuel Paul Schlorff (1928-2015) - A Reformed Presuppositional Approach to Muslim Ministry Introduction Samuel P. Schlorff was a missionary to the Muslim world, specifically in North Africa, and a scholar in the field of approaches to Islam. For many years Schlorff was a lone voice among Missiologists that wrote concerning the Muslim world. Schlorff’s perspective however was not unique – it was biblical, and specifically Reformed. Schlorff followed in the footsteps of giants before him, namely another Samuel, Samuel M. Zwemer, who also approached Islam from Reformed perspective. Schlorff may have been the first to apply features of Reformed Presuppositionalism to Muslim ministry, making his approach especially worthy of consideration for those that adhere to Reformed doctrines. To date there has been very little written about Samuel Schlorff, and his approaches to Muslim apologetics and discipleship of BMBs. Likewise, the approach of Samuel M. Zwemer has seemingly been lost in the multitude of novel approaches to Muslim ministry. It is my hope that Schlorff’s life and work will challenge scholars in their approach, and missionaries to Muslims to re-think and reform their current ministry practices. 1