Proof

Summa theologica

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

The God delusion

Richard Dawkins.

The Summa contra gentiles of Saint Thomas Aquinas

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

Long Farewell

Michael Innes

Roger's version

John Updike.

Natural Theology

Bernard Boedder

The conception of God.: A philosophical discussion concerning the nature of the divine idea as a demonstrable reality

by Josiah Royce, Joseph Le Conte and G.H. Howison, and Sidney Edward Mezes.

Does God exist?: An answer for today

Hans Küng ; translated by Edward Quinn.

Does God exist?

By A.E. Taylor.

The existence of God

by Richard Swinburne.