The Book of Cosmic Genesis begins by recounting a fusion of ancient Akkadian and Middle Egyptian creation mythology, before telling the stories of Abraham, Isaac, and Jacob, the ancestors of the Israelites. Their stories also include smatterings of Old and Middle Egyptian religious iconography, such as Jacob seeing the ladder up to the sky, which in Egyptian mythology was associated with Osiris since the Old Kingdom era.
The book culminates with the Israelites, the descendants of Jacob, all moving to Egypt during a famine in Canaan. Based on the chronology in the Septuagint, his famine would have been during the collapse of the Egyptian Middle Kingdom, which led to a group of Canaanites seizing control of Egypt, as described a the end of Cosmic Genesis.