Updated American Standard Version
Giving Bible readers what God said not what translators think God meant
Even though Adam and Eve were created to live forever, they were not immortal. Also, the angels, not even Michael the archangel has immortality. This is not really semantics, where the two different Greek words basically mean the same thing. Thus, immortality involves more.
Book of Life: (Gr. biblos tēs zōēs) In biblical times, cities had a register of names for the citizens living there. (See Ps. 69:28; Isa. 4:3) God, figuratively speaking, has been writing names in the “book of life” “from the foundation of the world.” (Rev. 17:8)
Let us begin with a brief overview of the book of like because there is little doubt that Abel, Noah, Abraham, Moses, Sarah, Rahab, Ruth, Esther, and other Old Testament people are written in the book of life.