Have you ever seen a book with some of the words printed in red instead of black? That's called a Red Letter Edition! It's a special way of printing certain words in the Bible to make them stand out and be more important.
Think about when a teacher uses a red pen to grade your homework. They're trying to draw your attention to something that's really important. That's the same idea with the Red Letter Edition. The people who make these Bibles want to help you see the most important parts of the Bible.
So, in a Red Letter Edition Bible, all the words of Jesus are printed in red. That way, you can easily see what he said and pay extra attention to it. Pretty cool, right?