The New Testament starts with the three Gospel books of Matthew, Mark and Luke. These three are known as the Synoptic Gospels. Gospel means “Good News”, and Synoptic refers to the fact that all three give an account of the same general events from the same point of view. The fourth book, John, is distinctly different from the three Synoptic Gospels, and includes much information not in the other three Gospels.
Luke explains the New Testament writers did not include much context in their writings because their audiences already knew those things. He explains that modern readers can be more informed if they understand things such as trade routes, exported products, and transportation.
Mark talks about how he came to write his Gospel. He quotes the first sermon of Jesus, and discusses the early ministry of Jesus. He explains how Jesus came into conflict with the Pharisees and Herod Antipas. He tells of the Greek woman and other events.