Replies

Because Revelation 20:6 happens before Revelation 20:12.

Indeed it does, and verses 1-5 come before that:

Revelation 20

1. And I saw an angel coming down out of heaven, having the key to the Abyss and holding in his hand a great chain.
2. He seized the dragon, that ancient serpent, who is the devil, or Satan, and bound him for a thousand years.
3. He threw him into the Abyss, and locked and sealed it over him, to keep him from deceiving the nations anymore until the thousand years were ended. After that, he must be set free for a short time.
4. I saw thrones on which were seated those who had been given authority to judge. And I saw the souls of those who had been beheaded because of their testimony for Jesus and because of the word of God. They had not worshiped the beast or his image and had not received his mark on their foreheads or their hands. They came to life and reigned with Christ a thousand years.
5. (The rest of the dead did not come to life until the thousand years were ended.) This is the first resurrection.
6. Blessed and holy are those who have part in the first resurrection. The second death has no power over them, but they will be priests of God and of Christ and will reign with him for a thousand years.
7. When the thousand years are over, Satan will be released from his prison
8. and will go out to deceive the nations in the four corners of the earth--Gog and Magog--to gather them for battle. In number they are like the sand on the seashore.
9. They marched across the breadth of the earth and surrounded the camp of God's people, the city he loves. But fire came down from heaven and devoured them.
10. And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever.
11. Then I saw a great white throne and him who was seated on it. Earth and sky fled from his presence, and there was no place for them.
12. And I saw the dead, great and small, standing before the throne, and books were opened. Another book was opened, which is the book of life. The dead were judged according to what they had done as recorded in the books.
13. The sea gave up the dead that were in it, and death and Hades gave up the dead that were in them, and each person was judged according to what he had done.
14. Then death and Hades were thrown into the lake of fire. The lake of fire is the second death.
15. If anyone's name was not found written in the book of life, he was thrown into the lake of fire.

Verse 4 has the folks who died in the TRIBULATION. If we Christians are alive during this time, and refuse the mark and are beheaded, then WE are going to be in this group.

If, however, we have already shed this mortal coil and are in our grave, then verse 5 kicks in - AFTER the 1,000 years are over.

When you point to Rev 20:12 it is also important to note this Great Judgment has certain humans excluded from it, as in the Bride of Christ ... the Lambs Book of Life is not the book opened in Rev 20:12.

Oh; but it is...

KJV Luke 10:20
Notwithstanding in this rejoice not, that the spirits are subject unto you; but rather rejoice, because your names are written in heaven.

KJV Philippians 4:3
And I intreat thee also, true yokefellow, help those women which laboured with me in the gospel, with Clement also, and with other my fellowlabourers, whose names are in the book of life.

KJV Revelation 3:5
He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, .but I will confess his name before my Father, and before his angels.

KJV Revelation 13:8
And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world.

KJV Revelation 17:8
The beast that thou sawest was, and is not; and shall ascend out of the bottomless pit, and go into perdition: and they that dwell on the earth shall wonder, whose names were not written in the book of life from the foundation of the world, when they behold the beast that was, and is not, and yet is.

KJV Revelation 20:12
And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.

KJV Revelation 20:15
And whosoever was not found written in the book of life was cast into the lake of fire.

KJV Revelation 21:26-27
And there shall in no wise enter into it any thing that defileth, neither whatsoever worketh abomination, or maketh a lie: but they which are written in the Lamb's book of life.

KJV Revelation 22:19
And if any man shall take away from the words of the book of this prophecy, God shall take away his part out of the book of life, and out of the holy city, and from the things which are written in this book.

There are no TWO books of life; just one.

There's no paperback version with some names in it, and a leather bound, thin papered, gilt lettered one with CHRISTIANS WITHIN lettered on it's cover.

The Book of Life IS the Lamb's Book of Life!