'Book' in the Bible

Then I said, “Behold, I come;In the scroll of the book it is written of me.

You have taken account of my wanderings;Put my tears in Your bottle.Are they not in Your book?

May they be blotted out of the book of lifeAnd may they not be recorded with the righteous.

Your eyes have seen my unformed substance;And in Your book were all writtenThe days that were ordained for me,When as yet there was not one of them.