27 March 2015
Yes there are changes in Audit paper for May 2015 due to Applicability of more section of Companies Act 2013. Check out the amendment issued by ICAI from link given below:
http://220.227.161.86/36416listprobos-iipc.pdf
Advisable to use new book for May 2015 and as advised by Ankit you must also complete RTP of May 2015 term.