Plz refer me any book or notes on 'standards of auditing'

hello friends,

I appeard for may 2012 CA final exams and didnt cleard as I scord only 35 marks in Auditing. 

In all other subjects I scored well.

I feel my week point in Audit is Standars on Auditing. I have gone through D.S. Rawat but I find them very lengthy so finally leave.

So please sugest me some good book or if u have some notes than plz attach them.