I am a huge fan of RS Aggarwal. I am reading his books from many years.
First I would like to tell you that this is the best book for competitive exams like banking, placements or any other government exams since the level of these exams are not very tough. This book is not suitaible for exams like CAT.
This book is not so expensive also. Language is very easy and easy to understand.
So for those students who are aspiring for such exams I would strongly recommend this book nothing else.