Christianity is an Abrahamic monotheistic religion based on the life and teachings of Jesus Christ, who serves as the focal point of the Christian faith. It is the world's largest religion, with over 2.4 billion followers, or 33% of the global population, known as Christians. Christians make up a majority of the population in 158 countries and territories. They believe that Jesus is the Son of God and the savior of humanity whose coming as the Messiah (the Christ) was prophesied in the Old Testament. These volumes give us the history of the religion from its origin to present day. It also gives the reader details of various rituals in the religion and how they worship. With lots of illustrations and pictures these books provide a reader with everything they need to know.