dear narayana iit students or any one can you say which book is the best for iit preparation1: narayana material2:cengage series

Dear Sriniketh,

For IIT preparation 

Askiitians provides U the best coaching material.

U can buy/try online.

 

@ sriniketh 

For my prep i have used cengage publication material . they are far better good than narayana . 

and also , narayana book is not that much good in chemistry theory , they have good no of problems in maths but in phy and chemi they are not good , even i have practiced that for maths . 
for jee .,best material u can refer is askiitian live classes and self study package , they have videoe which will clear your concept in one go . 
also u can also try that chapterwise..
so, follow askiitian alongwith ncert and cengage material . 

and also one test series . askiitian will be better option i think . 
ALL THE BEST ..