ISB ~ Revelation 20 v12

the book of life:A listing of all the saints destined for glory (3:5). It will be opened for the final roll call of the righteous at the Last Judgment, with the names of the saved read aloud (21:27) and the names of damned nowhere to be found (20:15).

• The book of life is a metaphor based on a comparison with human affairs. For it is common practice among men to inscribe in a book those who are chosen for an office. Now, since all the predestined are chosen by God for eternal life, the enrollment of the predestined is called the book of life (St. Thomas Aquinas, Summa Theologiae, I, 24, 1).