Book excerpt: Knowledge of key philosophic terms or concepts is vital to the understanding of many issues in Christian theology. Diogenes Allen's book "Philosophy for Understanding Theology" explores such terms and concepts and their relationship to theology. This new anthology, edited by Allen and Eric Springsted, provides primary texts undergirding that earlier work. The writings included here deal with philosophical issues crucial to the understanding of theology and include responses to those questions from Plato to the present. Whether used alone or as a companion volume, this new reader is a valuable resource for theological studies.