Answer:
Its title means book.
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat. And your heart grow cold. I visit the weak, but seldom the bold.
Two little holes in the side of a hill. Just as you come to the cherry-red mill.
Left to right Iām quite bright. Right to left I might bite.
The sharp slim blade, that cuts the wind. What is it?
What covers its face with its hands, speaks no language, yet most known what it's saying?