books for iit preparation for 11th class

please dont move here and there for books parth the best books for iit preparation in class 11 are following

maths -r.d sharma for theory and after that m.l khanna

chemistry- first ncert then o.p tondon

physics- h.c verma- concepts og physics 1

 good luck...............

1st level= NCERT

2nd level= rd sharma(maths), hc verma(phy.) ,op tandon(chem.) ,

final level= ml khanna(maths), objective book of arihant(maths,phy,chem)

try this in sequence

never jump in the levels

the most imp is try to complete ncert before it starts in your school

along with school you should complete the second level atleast

and if third level is left then try to complete on holidays

all the best 

be confident