I bought this book because most international versions of books are similar to the original edition of the book. In this case everything seems to be the same (I've checked with the original one, page by page and them look alike - couldn't really check all the content itself) except for the problems at the end of the chapter - the international verson has less problems when compared to the original edition. If this is not an issue and/or if you access the original version just to check the problems then you're fine because this is much cheaper (60% cheaper when I got it). I love it because I was able to save money and I simply couldn't afford the original one.