Ptolemy ruled Egypt and founded the ruling family that ended with the Egyptian queen Cleopatra. The letter known as the Letter of Aristeas describes how Ptolemy II requested translators and Eleazar sent 72 scribes, who translated the Septuagint in 72-days. He wanted these books for his library at Alexandria.
The Old Testament came from Ugarit. The OT story of the flood has an almost exact copy in Ugaritic literature. The Ugaritic (Cannanite) literature is similar to work in Hebrew composed between the seventh and the third century B.C. There is not one shred of evidence that any Israeli slaves ever lived in ancient Egypt. The Old Testament that supposedly came from Moses is probably based on the Egyptian pharaoh Akhenaten, who is also credited with creating monotheism. Like Moses Akhenaten led an exodus from Egypt.
Archaeologists are very competitive and they want to discover important finds. They can't be concerned about whether or not the public will like what they have found. Archaeological sweeps of the Sinai have failed to find any evidence of Moses et al wandering there. The OT story claims Moses was given the law on Mt. Sinai and was ordered by God to bring the law down to his people. That is not true, because it can be demonstrated to be false. It is also a fact that the Ten Commandments were not given to Moses on Mt. Sinai they came from the Egyptian Book of the Dead. This can easily be found to be true with a little research.
In the bible story Aaron is portrayed as casting a molten calf of gold from jewelry, earrings being given by the recently freed from Egypt Hebrew slaves (Ex 32:2-3). In the bible story they declare that the Golden Calf led them up out of Egypt to the Holy Mount. The story was merged. There was no Moses who wrote the first five books of the bible. Archeologists and Scholars know that many different people wrote them over many centuries.
Cuneiform texts of Ras Shamara - Ugarit attests that much of the Old Testament and the ancient Hebrew god were borrowed from the Canaanites. The Jewish people evolved from polytheism to monotheism with the promotion of a god who had been known by a variety of names, into one supreme God, Yahweh who had a consort, Asherah. This female entity was later merged by Greek and Roman traditions into Aphrodite and Venus, and known earlier to the Egyptians as Isis.
There was never any ancient sprawling kingdom of Israel; there was an ancient Jerusalem, but not the mythical kingdom of Israel. That phrase comes from the combination of three ancient deities, Isis - Ra, and El., and Moses never existed. A Egyptian Pagan pharaoh named Ptolemy first collected various books and put together what resembles the Bible of today. Ptolemy had the OT books translated around 250 B.C.
The Israelite lived for centuries with the Canaanites. Many of the sacrifices that are mentioned in the Ugaritic texts have names that are identical to those described in the book of Leviticus. It is also clear that Ugaritic and early biblical Hebrew poetry share a common literary tradition. El was used as the name of the all-powerful God of monotheistic religions. The Israelite identified him with their God YHWH in order to develop the monotheism of the Torah. Then, much later, under Jewish and Christian influence, Muhammad declared El, under his Arabic designation, Allah, to be the one true God and founded Islam.
When the royal palace of Ugarit was uncovered, a large number of cuneiform tablets were found. These tablets were the literature written down in about 1375 BCE but much older in origin. This literature described Canaanite gods that can be found in the Old Testament.
If you would care to read a book on the subject: Mark S Smith, 'The origins of biblical monotheism: Israel's polytheistic background and the Ugaritic texts', New York: Oxford University Press, 2001.