Audit book will change for nov

Dear Sir/Madam,

Currently 4th Additon of Audit book of Pankaj Garg is available in market. It was exclusively for May 2015 examination. Should I wait for 5th addition ? I am going to appear in Nov 2015 examination. 

Last year in July 2014, 3rd Addition was published for nov 2014...so it's expected to come new addition this year in Aug..it's too late point of view of preparation..is it okay with 4th Addition?

with regards,

Bhargav Nathwani.