First of all, i want to thank you to the authors of this book. It is perfectly prepared.
So, if you want to improve your reading and vocabulary skills this book absolutely fits you. Because it s designed by levels which means it starts from easy passages to harders. That' s why everyone can read and if reader shows attention and takes notes, he would gain very impressive vocabulary skills, and it helps his reading and understanding capability. Also helps to get high point on YDS. In instances, before i started to read this book my YDS point was just 42, after that i started to read -btw i ve read carefully and take notes- i got 63 point in the short period of time which is just 2 months.
In the end, i strongly recommend you to read this book.
Thanks.