Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Outstanding

Top notch thriller, mystery. It is very realistic and true to its subject matter. One mistake is on page 223 at the top, where it refers to taking a Glock pistol off safety. Glocks have no safety in the conventional sense, and there is nothing to take off. The only safety is the unique trigger, which is an automatic safety of sorts. This is my first time to read a book by Mr. Patrick, and it will not be my last.