"Presbyterians on the Frontier" is the culmination of four years research, site visits, and interviews seeking to capture the stories of those who have served in Presbyterian Border Ministry (PBM). Seeking to tell the story in context a chapter outlines the circumstances on the border when PBM was founded, PBM's vision for a new mission approach, and how it responded to border conditions through its vision of binational mutual partnership. It finishes with chapters on the present conditions on the border and the attempts of PBM to meet new challenges including overcoming the conflict between the national churches that founded PBM.