Hei BTG Expert,thanx a lot for helping us.sir,as i am not a native english speaker and as very average in grammar,i found "sentence correction"is the toughest part of gmat for me.as i v been reading "gamt success stories"for last 2 months on this forum i v noticed that many highest gmat scorer recommended "MANHATTAN SC"book is the best for Sc.but many also said,before reading manhattan sc it is better to read "aristotle Sc grail"as it is written in a systemetic pattern.so sir,plz suggest me which book should i use to improve my Sc score.also suggest me where (after learning necessary content for sc)i can practise SC QUESTIONS.THANX.