Hello,





Actually there's nothing like best or average in terms of books.What matters is the language. It is very much possible that you can find a book very easy and understandable whereas your friend might not be able to understand anything on it and vice versa. So, you will have to understand that which book is easy to understand for you.



Personally i took these following books :

Accounts: T.S Grewal

Economics: NCERT+S.Chand's micro and macro economics.

Business studies : Poonam Gandhi.



I hope this helps.