This is the latest edition of the textbook. I bought it new at a bookstore and only read it for about a week, so it's in very good condition. There are no markings or writing in it. Compared to the official text, it's summarized and explained in an easy-to-understand way, and it also comes with mock exams and online problem bonuses. I was able to pass the exam on my first try just by studying this book. Please feel free to comment if you have any questions.