The author of the Book of Genesis is not identified.
Traditionally, the author has always assumed to have been Moses.
There is no conclusive reason to deny the Mosaic authorship of
Genesis. Date of Writing: The Book of Genesis does not state
when it was written. The date of authorship is likely between
1440 and 1400 B.C., between the time Moses led the Israelites
out of Egypt and his death. Purpose of Writing: The Book of
Genesis has sometimes been called the "seed-plot" of the entire
Bible. Most of the major doctrines in the Bible are introduced
in "seed" form in the Book of Genesis. Along with the fall of
man, God's promise of salvation or redemption is recorded
(Genesis 3:15). The doctrines of creation, imputation of sin,
justification, atonement, depravity, wrath, grace, sovereignty,
responsibility, and many more are all addressed in this book of
origins called Genesis. Many of the great questions of life are
answered in Genesis. (1) Where did I come from? (God created us
- Genesis 1:1) (2) Why am I here?