2 Bible Verses about Books, Metaphorical Use

And I saw a great white throne, and Him Who was sitting thereon, from Whose face the earth and the heaven fled away; and no place was found for them. And I saw the dead, the great and the small, standing before the throne; and books were opened; and another book was opened, which is the book of life; and the dead were judged out of the things that were written in the books, according to their works.

And I went to the angel, saying to him, that he should give me the little book. And he says to me, "Take, and eat it up; and it will make your belly bitter, but in your mouth it will be sweet as honey." And I took the little book out of the hand of the angel, and ate it up; and it was in my mouth as sweet as honey; and, when I ate it, my belly was made bitter.