Books in this category focus on the End Times and the Apocalypse of Saint John, also known as the Book of Revelation, the final book of the Sacred Scriptures. A reading of the Bible will show that many different books reveal to us what the End Times will be like, but unfortunately many focus on the Apocalypse alone. The Books of Daniel and Isaiah in the Old Testament speak about the End Times. In many places through the Gospels, Our Lord Himself tells us abou the End Times and the Final Judgement - perhaps these are the most important words in the entire Sacred Scriptures for us to study and pray about for clarity on the End Times.

This area of theological study is called Eschatology. According to the Catholic Dictionary, Eschatology is the branch of systematic theology that treats of the last things: death, particular and general judgments, heaven, hell, and purgatory. All the essentials of eschatology have been clearly defined by the Church, notably the Fourth Lateran Council (1215) and the constitution Benedictus Deus of Pope Benedict XII in 1336. (Etym. Greek eschatos, uttermost + logos, discourse on.)