King's letter was written to a group of clergymen who had criticized his civil rights activism. He used some pretty cool literary devices to persuade them to see things from his perspective, like allusions and metaphors. It's like he's having a conversation with them, but with way more style and substance!
One of the quirky facts about the letter is that it was written in the margins of a newspaper, because King didn't have any paper with him in jail. Can you imagine writing something so powerful and influential in such a crazy situation? King's use of anaphora (repeating a phrase at the beginning of sentences) is also pretty cool, it's like a drumbeat that gets you pumped up and ready for action!
