The majority of the syllabus matches with NCERT syllabus for JEE MAINS. So if you consider the book for the theory then the books of NCERT's are quite good.

The previous year marks weightage of chapters are considered the below:

Physics :

• Modern Physics:- 20 marks
• Heat and Thermodynamics :- 12 marks
• Optics:- 12 marks
• Current Electricity :- 12 marks
• Electrostatics :- 12 marks
• Magnetics :- 8 marks
• Unit, Dimension and Vector:- 4 marks
• Kinematics :- 4 marks
• Laws of motion :- 4 marks
• Work, Power and Energy :- 4 marks
• Centre Of Mass, Impulse and Momentum :- 4 marks
• Rotation :- 4 marks
• Gravitation :- 4 marks
• Simple Harmonic Motion :- 4 marks
• Solids and Fluids :- 4 marks
• Waves :- 4 marks
• Electromagnetics Induction ; AC :- 4 marks

Chemistry :

• Transition Elements and Coordination Chemistry :- 12 marks
• Periodic table and Representative Elements :- 12 marks
• Thermodynamics And Gaseous State:- 8 marks
• Atomic Structure:- 8 marks
• Chemical Bonding:- 8 marks
• Chemical And Ionic Equilibrium:- 8 marks
• Solid State And Surface Chemistry :- 8 marks
• Nuclear Chemistry And Environment:- 8 marks
• Mole Concept :- 4 marks
• Redox Reaction :- 4 marks
• Electrochemistry :- 4 marks
• Chemical Kinetics:- 4 marks
• Solution and Colligative Properties :- 4 marks
• General Organic Chemistry:- 4 marks
• Stereochemistry:- 4 marks
• Hydrocarbon :- 4 marks
• Alkyl Halides :- 4 marks
• Carboxylic Acid and their Derivatives:- 4 marks
• Carbohydrates,amino acid and Polymers :- 4 marks
• Aromatic Compounds :- 4 marks

Maths :

• Coordinate Geometry :- 20 marks
• Limits, Continuity and Differentiability :- 12 marks
• Integral Calculus :- 12 marks
• Complex numbers and Quadratic Equation :- 8 marks
• Matrices and Determinants :- 8 marks
• Statistics and Probability :- 8 marks
• Vector Algebra :- 8 marks
• Sets, Relation and Function:- 4 marks
• Permutations and Combinations :- 4 marks
• Binomial Theorem and Its Application:- 4 marks
• Sequences and Series:- 4 marks
• Trigonometry :- 4 marks
• Mathematical Reasoning :- 4 marks
• Differential Equation :- 4 marks
• Statics and Dynamics :- 4 marks
• Differential Calculus :- 4 marks

The high weightage topics for JEE MAINS, you can get by visiting the link below:

https://engineering.careers360.com/articles/jee-main-syllabus-weightage

I hope this helps. Wish you a great eve!