Please help me as i m confused relating to Indirect tax for NOV 2015 exam.. I had referred Vineet Sodhani's book for May 2015 attempt, is it necessary to buy the new edition book for NOV 15 attempt which has all ammendments upto 30.4.2015 as labelled on the latest text book on Vineet Sodhani's sir book.. or continue learning with the the book i already have (May 2015)..