Book excerpt: Luther H. Martin and Donald Wiebe together have spent the better part of a century exploring possibilities for a scientific study of religion. The following essays are a record of their conversations together and of their conversations and controversies with a number of leading scholars in religious studies that address that possibility. As with any scientific endeavor, knowledge advances when research assumptions and experimental designs are collegially discussed and critically assessed. It is hoped that these essays might provide the occasion for scholars in the field to discuss the theoretical and methodological issues they have raised, to debate and expand upon them, or, in the spirit of forthright scientific inquiry, to refute the arguments they have made.