Characters in this story degrade and abuse African Americans, including using the N-word. The author does not condone it, but it’s needed for the plot and to make the characters despicable. It’s not intended to offend anyone or any group of people in real life, and that includes white Southerners who are not the way the story depicts them. This is fiction.
The story is not for everyone. It has vigilante justice. It has violence. It has non-consensual sex (I don’t use the “rape” story code because of SOL’s definition, but non-consensual sex is rape).
The protagonist is a cross between Jack Reacher and Dirty Harry. If you like those kinds of characters you should like this story.