sir,

actually i bought a book named"differential calculus for competitions"by shanti narayan and pk mittal(S.CHAND AND COMPANY).but there is no hologram on it as it is there in other books of this publication.so,i doubt the authenticity of the book.could you please sent me details of the book of calculus by shantinarayan which everyone refers to as the best on your site.is the book i have bought the same?kindly sent me an answer soon. 

hiiiiii

 

well the publisher is indeed S.Chand and Sons ... But i am not sure how to verify the authenticity .. means what information about book will help u verify the authenticity .. well i guess none .

 

I suggest that u go to some other book store and see for urself is the book that u have and one in market are same or not ?? ,, okay

 

cheers