Nahum.
His book is not long. Three chapters and that's it.
However, Nahum was speaking following a time of silence. At the beginning of his time, one of the worst, most evil, kings in the history of Judah (the northen kingdom of Israel is already swallowed up). Manasseh was wicked with a capital W.
The lessons here are as fascinating as they are ominous.
I'll toss out a question for you to consider ... Are you a friend or an enemy of God? The answer may not be a pleasant as you think.