One of Aquinas's best known works after the Summa Theologica, Summa Contra Gentiles is a theological synthesis that explains and defends the existence and nature of God without invoking the authority of the Bible. A detailed expository account of and commentary on this famous work, Davies's book aims to help readers think about the value of the Summa Contra Gentiles (SCG) for themselves, relating the contents and teachings found in the SCG to those of other works and other thinkers both theological and philosophical. Following a scholarly account of Aquinas's life and his likely intentions in writing the SCG, the volume works systematically through all four books of the text. It is, therefore, a solid and reflective introduction both to the SCG and to Aquinas more generally. The book is aimed at students of medieval philosophy and theology, and of Aquinas in particular. It will interest teachers of medieval philosophy and theology, though it does not presuppose previous knowledge of Aquinas or of his works. Davies's book is the longest and most detailed account and discussion of the SCG available in English in one volume.