The book of Genesis is the key to the Bible. In the New Testament it is quoted 27 times literally and 38 times substantially. It tells in a very few words how God first imaged man and the universe and then turned the development over to Jehovah, who has been in a process of manifestation for ages and eons.
The five books of Moses, of which Genesis is the first, have always been credited to Moses, but that he was the author seems doubtful in the face of the many stories of creation found in the legends and hieroglyphs of ancient Egypt, Chaldea, and other nations that are almost identical with those of Genesis. It would thus seem that Moses edited the legends of the ages and compiled them into an allegorical history of creation.