Although written over a time span of 1500 years, by about 40 different human authors, on three continents, there exists not even one contradiction in doctrinal teaching from Genesis to Revelation. Most sermons that you will hear confirm this truth, as a preacher will cite passages from various books in both Testaments to make his point. That is, that all parts of the Bible are necessary to the complete whole. Every book of the Bible is essential. The Creation of the universe and mankind, in only two chapters.
Sin enters the world is contained in one chapter.
The birth of Jesus, Matthew 2 and Luke 2. The whole life of Jesus Christ upon this earth is found in four short Gospels. Throughout the Bible, the reader can perceive the divine restraint that prevented the human authors from elaborating or rambling.