Hii

JEE Main best books for reference-

Physics-

Concepts of Physics by H C Verma

Problems in General Physics by I.E. Irodov

Arihant Physics by D. C. Pandey

Chemistry-

Modern Approach to Chemical Calculations by R.C. Mukherjee

For Physical Chemistry-Atkins' and N Awasthi’s Physical Chemistry

For Organic Chemistry- Organic Chemistry by Paula Bruice Yurkanis, O.P. Tandon Organic Chemistry and Organic Chemistry by M.S. Chauhan

Mathematics-

Trigonometry; 103 Trigonometry Problems by Titu Andreescu & Zuming Feng by S.L.Loney, Titu Andreescu & Zuming Feng

Co-ordinate Geometry by S.L.Loney

Higher Algebra by Hall Knight+ Bernard-child

Problems in Calculus of One Variable Algebra by I.A.Maron

To know about JEE Main 2019 – Preparation Tips, Important Topics & Books, Click below link-

https://engineering.careers360.com/articles/jee-main-2019

All the best.

hii 

shanu angiras 

yeah which u told is 100% correct only NCERT text book but in meanwhile u should practice more problems in physics for auther by name is HC verma it is excellent for problem sloving and chemistry  by author by O.P. Tandon and for mathematics is author by R K tyagi

all the best