Debates about the place of mission work in English Language Teaching continue to rage, and yet full-length studies of what really happens at the intersection of ELT and evangelical Christianity are rare. In this book, Johnston conducts a detailed ethnography of an evangelical language school in Poland, looking at its Bible-based curriculum, and analyzing interaction in classes for adults. He also explores the idea of ‘relationship’ in the context of the school and its mission activity, and more broadly the cultural encounter between North American evangelicalism and Polish Catholicism. The book comprises an in-depth examination of a key issue facing TEFL in the 21st century, and will be of interest to all practitioners and scholars in the field, whatever their position on this topic.