May 2015 group 1 examination ca final

Dear friends, I have appeared group 2 Final this Nov 14 and planning to appear group 1 this may 2015. I know that there are changes in fr,audit,law papers. please tell me for accounting standards for fr paper, should I buy a new book. presently i have accounting standards 2011 edition only. now should I buy a new book? please tell me for what papers in group 1 final I should buy a new book for may 2015 final exam