Hi , I will try to relieve your confusion.
The Bible consists of the Old Testament and the New Testament.
The Old Testament starts with the creation of the world in the book of Genesis (first book of the Bible) and continues in covering the life and times of the ancient Israelites through the view of the prophets who wrote the Old Testament as they were directed by God.
The New Testament consists of the 4 Gospels, written by John, Mark, Matthew and Luke all Apostles of Jesus Christ.
The 4 Gospels tell the same story of the life, words, ministry, miracles, death and resurrection of Jesus from 4 different perspectives.
The New Testament also contains the letters of the Apostles who formed the early Christian church after the death, resurrection and ascension to heaven of Jesus Christ.
So the whole order of the Bible is Old Testament followed by New Testament. And within the New Testament it starts with the 4 Gospels of Jesus Christ followed by the letters of the Apostles of Christ and the last book of the Bible is Revelation which is prophecy about the second coming of Christ. Revelation is also written by John the Apostle, who wrote one of the Gospels, as he had a vision from Jesus.
Well, now that I have to explain it, it is kind of confusing. I hope this helps.
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