Who put the Bible together?

Answer 1

This answer refers to the Hebrew Bible only.

The Jewish Bible is the Tanakh, which contains the following:

The Torah (the Five Books of Moses):According to tradition, the Torah was given by God to Moses (Exodus 24:12) in 1312 BCE. Moses taught it to the people (Exodus ch.34), and put it in writing before his death (Deuteronomy 31:24) in 1272 BCE. (See: more about Moses)
Nevi'im (the Prophets):

Jewish tradition (Talmud, Bava Batra 14b) states that the prophetic books were written by the authors whose names they bear: Joshua, Samuel, Isaiah, Jeremiah, Ezekiel, Hosea, Joel, Amos, Obadiah, Jonah, etc. Judges was written by Samuel, and Kings was written by Jeremiah. The prophetic books were written in the time of the prophets, from the 1200s BCE (Joshua) to the mid-300s BCE (Haggai, Zechariah, Malachi).

See: More about Samuel, and see: How many Isaiahs?

Ketuvim (the Writings):

Jewish tradition (Talmud, Bava Batra 14b) states that the Writings were written by the authors whose names they bear: Daniel, Ezra and Nehemiah. Ruth was written by Samuel; Lamentations was written by Jeremiah; Psalms was set in writing by King David; Chronicles was written by Ezra; Proverbs, Song of Songs and Kohellet (Ecclesiastes) were written by King Solomon; and Esther was written by Mordecai andEsther. The Writings were written between 900 BCE (Ruth) to the mid-300s BCE (Esther, Daniel, Chronicles, Ezra and Nehemiah).
Concerning Job, the Talmud states more than one opinion as to when it was written.

Hebrew Bible Canon:

Our tradition is that from the time of the First Destruction, God's presence was no longer felt as clearly as before (see Deuteronomy 31:17-18). In addition, exile is not conducive to prophecy (Mechilta, parshat Bo). At that time, the last of the prophets realized that prophecy would soon cease; and that the dispersal of the Jewish people, plus the almost continuous tribulations from the First Destruction onward, made it imperative to seal the canon of the Tanakh (Hebrew Bible). The Sages of the time, including the last living prophets, convened a special synod for a couple of decades, which was called the Men of the Great Assembly (Mishna, Avot ch.1). This group, who functioned around 340 BCE, composed the blessings and the basic prayers of the siddur (prayerbook) and the early portions of the Passover Haggadah, made many of the Rabbinical decrees, and (most importantly) sealed the canon of the Tanakh. It was they, for example, who set the twelve Minor Prophets as (halakhically) a single book, and who set the books of the Tanakh in their traditional order (see Talmud, Bava Batra 14b). It was the Men of the Great Assembly whom Esther had to approach when she felt that the Divinely inspired Scroll of Esther should be included in the canon (see Talmud, Megilla 7a).
Since the sealing of the Tanakh, no Jewish sage has ever claimed prophecy.

Order of the Tanakh's books:
The Hebrew Bible is in chronological order: first the five books of the Torah, since they were given before any of the other prophetic books. Then Joshua, Judges, Samuel and Kings in that order, since that is chronological. Ruth (and others) could be before Kings, but we keep the Prophets and Writings separate.
After Kings, we have Isaiah, Jeremiah and Ezekiel, which is in chronological order. All three of them lived well after the kings had already started.
The Twelve Minor Prophets, who also lived during the latter part of the era of the Kings, are gathered together in a single book of their own.
Then we have the Writings. Psalms, Proverbs and Job are together since they (and none of the other books) are a specific type of poetry ("Taamei Emet", with special trope).
The Five Megillot (Song of Songs, Ruth, Eichah, Kohellet, Esther) are together, in the order in which they're read in the synagogue.
Finally, the books of Daniel, Ezra-Nehemiah and Chronicles were written in the end of the prophetic period.

Importance of the Tanakh:

The Tanakh is important because it tells the history of the ancient Israelites, as well as giving us the teachings of the Israelite prophets and kings, and the laws, ethics and beliefs of the Jewish religion.Our tradition is that the Hebrew Bible is from God (Exodus 24:12), given to us to provide knowledge, guidance, inspiration, awe and reverence, advice, law, comfort, history and more. It is the basis of Judaism. It crystallized, strengthened and codified our beliefs; insured our awareness and knowledge of our identity and history; and provided powerful impetus to be ethical.
It made us stand in awe of God, while also providing optimism and comfort through the prophecies of redemption. It inspired us to strive for holiness and informed us how to pray and to approach God's presence.
And it set detailed laws, practices and traditions for The Jewish people forever.

See also:

Jewish history timeline

How is the Hebrew Bible presented?

How was the Torah written?

Debunking the Bible-critics

Answer 2

Many of the books in The Bible are either anonymous or pseudepigraphical, so we do not know that actual names of the authors. In other cases such as the Books of Genesis and Isaiah, scholars have established that more than one author contributed to the final work, making it even more difficult to know who wrote the Bible or even how many authors there were.

Answer 3

Another answer from our community:The Bible itself is inspired of God but was put together by the writings of 40 different men.

Answer 4

Thomas Caxton about 1599