The Summa Theologica, by Thomas Aquinas, is a fundamental text in Catholic doctrine, a compendium of theology that has been studied and debated since its first publication in the 13th century. Furthermore, it has been widely regarded as one of the classics of Western philosophy, not least because, perhaps for the first time in such a systematic manner, it set out to consider the views of non-Christian figures such as Aristotle, Boethius, Muslim writers including Averroes (Ibn Rushd) and Avicenna (Ibn Sina) and the Sephardic Jewish scholar Maimonides.

Gilbert Keith Chesterton (1874-1936) was a British writer, philosopher, lay theologian, and literary critic. Chesterton wrote around 80 books, several hundred poems, some 200 short stories, several plays, plus 4,000 essays and newspaper columns. He was a columnist for the Daily News and The Illustrated London News.

Few people had a more profound effect on Christianity in the 20th century than G. K. Chesterton. The Everlasting Man, written in response to an anti-Christian history of humans penned by H.G. Wells, is considered Chesterton’s masterpiece. In it, he explains Christ’s place in history, asserting that the Christian myth carries more weight than other mythologies for one simple reason—it is the truth.

C.S. Lewis' famous work on the nature of love divides love into four categories: affection, friendship, eros and charity. The first three are loves which come naturally to the human race. Charity, however, the gift-love of God, is divine in its source and expression, and without the sweetening grace of this supernatural love, the natural loves become distorted and even dangerous.

An enthusiastic admirer of the philosophy of Thomas Aquinas, professor and philosopher Peter Kreeft details the rational thought and precise literary talent that established Aquinas as the foremost thinker of his time - and as the most important philosopher for the almost 200 years between Aristotle and Descartes.