I am reading this book for over a year now and I found it to be very helpful in my govt exam preparation like SSC Cgl and IBPS. It is not so detailed as grammar books because it is based on objective English and it is mostly for practice and making your english understanding better.
There are many similiar books avalaible in market but this is better than most of them because of it's renowned author and its awesome content. The level of English in this book is not very hard. It is from medium to hard and mostly easy to study.
There is also a vocabulary section where you can learn tons of words and improve your vocabulary.
If you are preparing for competitive exams then this English book can be your best friend like it's mine.
