Okay, so let me explain to you what an Atlantic Reporter is in very simple terms.
An Atlantic Reporter is basically a collection of books that have a lot of legal cases from courts in the Atlantic region of the United States.
Let's say two people have a problem or disagreement and they can't come to an agreement, they might go to court to have a judge decide who is right. When the judge makes a decision, it becomes a legal case.
These legal cases are then reported in the Atlantic Reporter books for others to read and learn from. Lawyers, judges, and law students use these books to understand how courts in the Atlantic region have made decisions on legal cases in the past.
So, in short, the Atlantic Reporter is a collection of books that have legal cases from Atlantic region courts for people to learn from.