2 Bible Verses about Books, Metaphorical Use

And I saw a great white throne, and one sat upon it, from whose presence fled the earth and the heaven, and no place was found for them. And I saw the dead, small and great, standing 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 the things written in the books according to their works.

And I went up to the angel, saying unto him, Give me that little book. And he saith to me, Take it, and eat it up; and it will make thy belly bitter, though in thy mouth it will be sweet as honey. And I took the little book out of the angel's hand, and ate it up; and it was in my mouth as honey sweet; yet when I had eaten it, my belly was made bitter.