Hello Shrinjoy,

You should ask about the books from your teachers when your classes start because they know the best book according to your university but until then the best books for the subjects are - 

1. Mathematics - I & II - B.S.Grewal, Higher Engineering Mathematics

2. Physics - Engineering Physics by Gaur and Gupta

3. Electronics - Basic Electronic's and Linear Circuits by N.N.Bhargava

4. Basic Electrical Engineering - V N Mittle, Basic Electrical Engineering

5. Engineering Mechanics - Timoshenko and Young, Engineering Mechanics

6. Engineering Graphics - N.D.Bhatt, Elements of Engineering Drawing

7. Thermodynamics - PK Nag

All The Best.