Dear student,

The syllabus for B.Tech 1st year is nearly same for all the branches. So, below I am listing some very good books for each of the subjects.

Mathematics :

Higher Engineering Mathematics by BS Grewal

Maths by NP Bali

Physics :

Physics by David J Griffiths

C Programming :

C Programming by E Bala Guruswamy

Engineering Drawing :

EGD by ND Bhatt

Communicative Grammar of English by Geoffrey Leech and Ian Svartik.

These books are written in very easy language. And these are easy to understand.

Hope it helps.