'Olli-Pekka Vainio presents a superb treatment of the theological and philosophical issues swirling around "fideism". He not only treats his various sources with care and skillfully brings readers into the conversation, he also charts new territory in helping us think through the relation of theological rationality and core Christian doctrines. Anyone interested in postliberal theology, Reformed or Catholic epistemology and the relation between faith and reason will need to read and consider this work carefully. It represents the best presentation of these matters to date.' Stephen D, Long, Marquette University, USA