Considering the rigor of the subject, this is not the best book to rely upon. But presents all the syllabus in brief at a place, with a couple of years' papers (solved). Bright publications book (in my opinion) is more useful, as it has unsolved papers of all subjects for 7-8 years and solved for General English and GK for all those years in one book.

good

This book is not at all recommended if you are serious about the exam. It contains so many errors, incomplete theory and worst of all, there are no previous years' questions from the IFS exams. It's just a bunch of copy-pasted material which will frustrate you.

Although this book contains all the syllabus at just one place, but still this book suffers lack of consistency, better guidance as well as there are so many mistakes are there... One can
buy this book only for topic reference but not for questions and theory.