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JEE Main best books for reference-

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

For Inorganic Chemistry- Book by J.D Lee and O.P. Tandon

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

Algebra by Arihant

Differential Calculus by Arihant

Integral Calculus by Arihant

Complete Mathematics for JEE Main by Tata McGrawHill (TMH)

New Pattern Mathematics for JEE Main/Advanced by Arihant Publications

All the best.