Is concept of p bahadur good for theory
Firstly I would suggest you to prefer NCERT books as it will help you to clear your basic concept then You can prefer the other books. Books for Mathematics
Trigonometry by S. L. Loney
Higher Algebra by Hall & Knight
Maths XI & XII by NCERT
Co-ordinate Geometry by S. L. Loney
Problems in Calculus of One Variable by I.A. Maron
Books for Physics
Problems in General Physics by I.E. Irodov
Fundamentals of Physics by Halliday, Resnick & Walker
Concepts of Physics Vol I and II by H.C. Verma
Books for Chemistry
Organic Chemistry by Paula Bruice Yurkanis
Organic Chemistry by Morrison & Boyd
Inorganic Chemistry by J.D. Lee
Numerical Chemistry by P. Bahadur
You can also prefer the below given article for the further information.
https://engineering.careers360.com/articles/best-books-for-jee-main-2019
Good Luck!