I read that book several times during my private christian elementary schooling days...

The seven seals are opened, each time a seal is broken things appear -one is the pale horse of death and another is of souls who died in the name of christ and they cry out for the judgement day, another the moon is blood. God brands on the forehead those that are his servants -no more pain, brings them to heaven. Then the angels sound trumphets one at a time, and man is being wiped out by plagues of all sorts each time.. John eats a book and it tastes sweet like honey, nature attacks again, and then it is about the sign in heaven of the woman who is about to give birth. A red, seven headed dragon appears waiting to devour her child so the angels attack it and the woman. The dragon/satan is thrown to earth and instead tries to devour the woman. But she is given angel's wings to escape, a river of water pours out of the dragon's mouth, another beast appears from the ocean to worship the dragon -they conquer the sinners on earth..

13:16 He causes all, the small and the great, the rich and the poor, and the free and the slave, to be given marks on their right hands, or on their foreheads;

13:17 and that no one would be able to buy or to sell, unless he has that mark, the name of the beast or the number of his name.

13:18 Here is wisdom. He who has understanding, let him calculate the number of the beast, for it is the number of a man. His number is six hundred sixty-six.

Then the sinners are tormented by angels and demons come out of satan's mouth.

17:6 I saw the woman drunken with the blood of the saints, and with the blood of the martyrs of Jesus. When I saw her, I wondered with great amazement.

You skip a lot of chit-chat about the effects of plagues and then,

22:21 The grace of the Lord Jesus Christ be with all the saints. Amen.

Good book.