Most appellate court judges write opinions in which they give the reasons for their decisions. these opinions are collected and published in volumes of books known as:

I believe the answer is: Reporter

The main purpose of a reporter is to help future judges in making their decision if they are facing similar case, along with explanation to the public on why a certain landmark decision that could change the constitution is being made. The appelate courts have been writing this reporters since 1816

answer; ///approx///5,000 miles;