Enoch - And on that day Michael answered Raphael and said: 'The power of the spirit transports and makes me to tremble because of the severity of the judgement of the secrets, the judgement of the angels: who can endure the severe judgement which has been executed, and before which they melt away?'

Notes

The book of Enoch is not part of the canonical scriptures (The Bible) we know today and we don't know how accurate it is.

Some belive while Enoch is not inspired by God that it still serves as a historical book on the time before the flood. It's also quoted in the New Testament in Jude 1:14-15.

Because of this I wanted to include this book for historical reasons.

I would recommend reading the Bible first and foremost as it should be your foundation. Then if you are intrested you can take a look at the book of Enoch.