God

Summa theologica

St. Thomas Aquinas ; translated by Fathers of the English Dominican Province.

The God delusion

Richard Dawkins.

The New Testament and the People of God (Christian Origins and the Question of God)

N. T. Wright

Sinners in the hands of an angry God

Jonathan Edwards.

The Consolation of Philosophy

Boethius

Valis

Philip K. Dick

Meditations on First Philosophy

René Descartes

The Summa contra gentiles of Saint Thomas Aquinas

literally translated by the English Dominican fathers from the latest Leonine edition.

The Guide of the Perplexed: Vol. 1

Moses Maimonides, Shlomo Pines

A history of God: the 4000-year quest of Judaism, Christianity, and Islam

by Karen Armstrong.