Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Dubin is a sex offender

The book is well written but When you buy this book you are putting money in the hands of a dangerous man. There is a reason why a plastic surgeon is writing EKG books. The reason is that he can't practice medicine anymore because he bribed teenage girls with drugs to commit sex acts while he video taped them. Google itThere has to be a book out there on EKGs that isn't written by a registered sex offender, consider buying that one