I bought this book 2 years ago for compititive exams like ssc , ntpc , railway , banking etc. I read it two times but I think it is not very useful for competitive exams.the language of this book is average. It has not proper concept. In this book most of the topics are too short. The topics are not in detail. So I think is worst especially for ssc exams. It does not have sufficient study material or content. There are many errors in various topics like geography , history.so I think it is not a good book.
Thank you