***The following is a mix of quotes taken from the internet. I hope this helps answer your question. God bless.
The authorities that sought to acknowledge the canonical books used standards like the following:
"Was the book written by a prophet of God?"
"Was the writer confirmed by acts of God?"
"Did the message tell the truth about God?"
"Does it come with the power of God?"
"Was it accepted by the people of God (Inspired Scripture will be recognized by those who are spiritually prepared (John 8:47; 18:37; 1 Corinthians 14:37-38; 1 John 4:6). Thus, if a very long time passes before a candidate book is acknowledged as canonical, it cannot be canonical.)?"
Charles Ryrie, in his book Basic Theology, explains several things about the word canon:
1. Its derivation. The word comes from the Greek word kanon, which refers to a measuring instrument. It therefore came to mean a rule of action (this is the word rendered rule in Galatians 6:16 and Phil. 3:16, KJV).
2. Its history. In the early church the word canon was used to refer to the creeds. In the middle of the fourth century it came to be used of the Bible; i.e., of the list of accepted books that were acknowledged to make up the Bible.
3. Its meaning. Actually the word canon has a twofold meaning. It refers to the list of books that met certain tests or rules and thus were considered authoritative and canonical. But it also means that the collection of canonical books becomes our rule of life. Preservation of the Canonical Books old testament. Before the Babylonian captivity, the OT books were apparently laid beside the Ark of the Covenant in the Temple (Deut. 31:24-26). During the Babylonian captivity, they were probably carried to Babylon. Daniel 9:2 indicates that Daniel had access to them. Daniel says he was reading Jeremiah and the writings, a reference, no doubt, to the other OT books written up to that time. After the Babylonian captivity, the books Daniel refers to may have been taken back to Jerusalem by Ezra and kept in the newly completed Temple (see Ezra 3:10-11; Ezra 6:15-18; Neh. 8:1-8). New testament While the OT books were kept in the Temple, the NT books, unwelcome in the Temple, were apparently cared for and circulated among the Christian community by various local churches (Col. 4:16; 1 Thes. 5:27). Tests of Canonicity: To determine whether or not they should be a part of the Bible, books were subjected to various tests: Authorship. Was the author respected and regarded as speaking with divine authority? Local church acceptance. Had it been read by the various churches? What was their opinion of it? Early church leaders recognition. Did the students of Christs apostles (such as Polycarp, a disciple of John) quote from the book? Content. What did the book teach? Did it contradict other recognized books? Personal edification. Did the book inspire, convict, and edify local congregations and individual believers?Bible Books Whose Canonicity Was Disputed The canonicity of about a dozen books now in the Bible was at first doubted:
Disputed Old Testament books: Esther, because it makes no overt mention of God Proverbs, because of seeming self-contradictions (e.g., Proverbs 26:4-5) Song of Songs, because it seemed merely a poem on human love Ecclesiastes, because some felt it taught atheism (e.g., Eccles. 9:5) Ezekiel, because it seems to contradict the Mosaic law Disputed New Testament books: Hebrews, because of uncertainty about its authorship James, because it seemed to contradict the teachings of Paul (compare James 2:20 with Ephes. 2:8-9)1, 2, 3 John, because they seemed to be purely personal letters
Jude, because it refers to the uncanonical book of Enoch
Revelation, because of uncertainty about the books authorship and because of its mysterious symbols The Apocrypha After the OT canon had been recognized by the Jews as officially closed, and prior to the NT period, there arose a body of literature which is today commonly referred to as the Apocrypha. Apocrypha literally means that which is hidden. The term refers to the 14 books which were included in the Greek Septuagint but not in the Hebrew OT. The Apocrypha is accepted by the Roman Catholic church and appears in Catholic and various other versions of the Bible. Here is a brief survey of the apocryphal books: 1 Esdras covers much of the material found in Ezra, Nehemiah, and 2 Chronicles, but also includes a fanciful story concerning three Jewish people working as servants while captive in Persia. King Darius asked each of them what was the greatest thing in the world. One said wine, another replied women, while the third said truth. When offered a reward, the man who had said truth suggested the king allow the Jews to rebuild the Temple in Jerusalem. l 2 Esdras tells of visions given to Ezra, dealing with Gods government of the world and the restoration of lost Scriptures. l Tobit is the story of a pious Jew who is blinded by sparrow dung and healed by an angel named Raphael, who applies a concoction of fish heart, liver, and gall to his eye. Judith tells of a beautiful and devout Jewish princess who saves Jerusalem from Nebuchadnezzar. She beguiles the enemy general through her beauty, then returns to Jerusalem with his head in her handbag!
Additions to the Book of Esther try to show the hand of God in the story of Queen Esther by inserting six additional passages in which the word God and the subject of prayer receive frequent mention. (The word God does not appear in the canonical Esther.) Wisdom of Solomon, often called the Gem of the Apocrypha, tries to teach a biblical view of righteousness in a way that would appeal to the Greek mind. Ecclesiasticus, also called the Wisdom of Jesus the Son of Sirach, resembles Proverbs and gives detailed rules for personal conduct in civil, religious, and domestic life. Letter of Jeremiah purports to be a letter, similar to the one mentioned in Jeremiah 29, from Jeremiah to the exiles in Babylon. Baruch was supposedly written by Jeremiahs secretary, Baruch. It contains prayers and confessions of the Jews in exile, along with promises of restoration. Song of the Three Young Men adds to the book of Daniel, taking up the story right after the fiery furnace episode (Daniel 3). It contains the eloquent prayer of one of the three Hebrew men thrown in the fire. (Some treat this prayer as a separate book.)
Susanna relates how the godly wife of a wealthy Jew in Babylon, falsely accused of adultery, was cleared by the wisdom of Daniel. Bel and the Dragon is also an addition to Daniel and relates the destruction of the idols Bel and the Dragon, two objects of Babylonian worship. It also tells of Daniels rescue from the lions. Prayer of Manasseh is supposedly the confessional prayer of wicked King Manasseh of Judah after he was taken captive to Babylon (2 Chron. 33:12-13). 1 Maccabees is the history of the Maccabean period (175-135 b.c.), telling of the Jews heroic struggle for liberty.1 and 2 Maccabees covers in part the same period as 1 Maccabees but is somewhat inferior in content. Reasons for rejecting the books of the Apocrypha include the following: The apocryphal books were never included in the OT canon by such recognized authorities as the Pharisees and Ezra. None of them were ever quoted by any NT writers. The great Jewish historian Josephus excluded them. The well-known Jewish philosopher Philo did not recognize them. The early church fathers excluded them. The Bible translator Jerome did not accept them, though the pope forced him to include them in the Latin Vulgate Bible. None of these 14 books claims divine inspiration; in fact, some actually disclaim it. Some of them teach false doctrines, such as praying for the dead. No apocryphal book can be found in any catalogue list of canonical books composed during the first four centuries a.d.