Hello everyone!
To contribute to the Question: The 67th Book of the Bible.
In the time of the Apostles when church started and the word of God spread to even the gentiles, there arose a contention that the gentiles should be circumcised and should obey all the laws as the Jews do, so the Apostles swiftly meet with the Elders and the Brethren to write an Epistles to the Gentiles, according to Acts 15: 19 - 30.
“It is my judgment, therefore, that we should not make it difficult for the Gentiles who are turning to God.
Instead we should write to them, telling them to abstain from food polluted by idols, from sexual immorality, from the meat of strangled animals and from blood.
For the law of Moses has been preached in every city from the earliest times and is read in the synagogues on every Sabbath.”
So we all agreed to choose some men and send them to you with our dear friends Barnabas and Paul—
men who have risked their lives for the name of our Lord Jesus Christ.
Therefore we are sending Judas and Silas to confirm by word of mouth what we are writing.
It seemed good to the Holy Spirit and to us not to burden you with anything beyond the following requirements:
You are to abstain from food sacrificed to idols, from blood, from the meat of strangled animals and from sexual immorality. You will do well to avoid these things. Farewell.
So the men were sent off and went down to Antioch, where they gathered the church together and delivered the letter.
They instructed the Gentiles in Antioch, Syria and Cilicia to abstain from meat offered to idols, strangled things, blood and from fornication.
So this Epistle is one of the true books of the Bible as it was written by Apostles, Elders, and the Brethren, and should be regarded as the 67th book of the Bible.
Also, the opinion that about 40 authors wrote the Bible is not true. So many persons, Apostles, Elders, Brethren and others wrote the Bible.
You may as well watch my contribution in the video below:
To participate, you can watch brother 
This is my contribution.
Thanks for reading.