I purchased this book 2 months before and I have finished the most of it. I am totally in love with this book. It is so easy to understand that even a beginner in English language can understand it without much effort.
Every word has been explained so good that you will not forget it ever. After two months I can say that my vocabulary has improved very much.
It literally had every other word which you are going to use in day to day life. I had tried many books in the past but I didn't like any other book as much as this one.
Now I am regularly learning new words from it daily so you can too.