Hi,

RD Sharma is a very good book and have many questions for each chapter. You can refer to RD Sharma for JEE Main Preparation but you cannot depend on this book only.

Some of the important books for JEE Main are-

Physics-

• Concepts of physics (Vol. 1 and 2) by H.C Verma
• Understanding Physics by DC Pandey

Chemistry-

• Concept of Physical Chemistry by P Bahadur
• Organic Chemistry by O P Tandon
• Physical Chemistry by P.W. Atkins

Mathematics-

• Differential Calculus by Amit M Agarwal
• Algebra by Dr S K Goyal
• Complete mathematics for JEE Main TMH

Also, Check Best Books for JEE Main

With the help of RD sharma you can qualify JEE Main exam but if you want to score good marks you have to refer other books as well. Your basic should be clear in order to get good marks you should refer NCERT book as well alongwith previous year papers. Mathematics require lot of practice. So, you need to solve as much as MCQs for your preparation

Below are the some of the recommended books for your preparation-

Basic

->Higher Algebra -By Hall & Knight
->Trigonometry- S.L. Loney
->Coordinate Geometry - S.L. Loney
->Vectors - S.L. Loney
->Problems in Calculus of One Variable-By I.A. Maron
->Mathematics-By Tata Macgraw Hill

Advanced

->Calculus-By J. Edward
->Vector-By Shanti Narayan
->Integral Calculus-Shanti Narayan, S.Chand & Co.
->Differential Calculus-Shanti Narayan, S.Chand & Co.
->A Problem Book in Mathematical Analysis-G.N.Berman, CBS Publishers

Good Luck!!