Ca final audit study plan

I will be appearing for May 2014 Exams but haven't startes Audit Paper preparation as of now.Wanted your sugggestions as to how to start this subject to complete it in 15-20 days.I have noticed that ICAI doesn't entertain many in this subject and scores of many sttudents are limited to 40 and 50.I have purchased Vinod Kumar Agarwal's Audit book.Will it be sufficient or i need to switch to some other notes??? 
Thanks in advance