The first part of Exodus recounts how Abraham’s family ends up enslaved in Egypt. God raises up a deliverer to confront the evil of Pharaoh and to liberate the Israelites. From Egypt they set out into the wilderness on the way to Mt. Sinai.
The collection of books from Genesis through Deuteronomy, also known as the Torah, tells the story of creation, the birth of the nation of Israel, and God's covenant with that nation after he saves that nation out of Egypt.