Do i need to buy new edition of these books ?

Stephen Andrews (Ipcc student) (47 Points)

10 February 2013  

I am going to  write IPCC (second attempt) May 2013.

I have:

Law:Munish Bhandari 8th edition (which says amended upto 1st May 2012)

Auditing:Surbhi Bansal 9th edition

The latest books of these authors are Munish Bhandari 9th edition and Surbhi Bansal 10th edition.

Is it necessary to buy these new ones for the upcoming IPCC.

Kindly help ...