See the curriculum varies from university. But in general the books those are highly required in you BTech 1st year are provided below:

ENGINEERING PHYSICS :

1. Applied Physics – P.K.Palanisamy (SciTech Publications (India) Pvt. Ltd., Fifth Print 2008).
2. Applied Physics – S.O. Pillai & Sivakami (New Age International (P) Ltd., Second Edition 2008).
3. Applied Physics – T. Bhima Shankaram & G. Prasad (B.S. Publications, Third Edition 2008).

Maths :

1. Mathematical Methods by P.B.Bhaskara Rao, S.K.V.S. Rama Chary, M.Bhujanga Rao, B.S.Publications.
2. Mathematical Methods by K.V.Suryanarayana Rao by Scitech Publications.
3. Digital - Digital Design - Morris Mano.

Computer Applications :

1. Computer Architecture - Computer Architecture: A Quantitative Approach, by Hennessey and Patterson.
2. Data Structures - Introduction to Algorithms, by Thomas Cormen, Charles Leiserson, Ronald Rivest and Clifford Stein.

ENGINEERING CHEMISTRY :

1. Textbook of Engineering Chemistry by C.P. Murthy, C.V. Agarwal, A. Naidu B.S. Publications, Hyderabad (2006).

2. Textbook of Engineering Chemistry by S.S. Dara & Mukkati S. Chand & Co,New Delhi(2006).

COMPUTER PROGRAMMING AND DATA STRUCTURES :

1. C Programming & Data Structures, E. Balagurusamy, TMH.
2. Data Structures using C, A.M.Tanenbaum, Y.Langsam, and M.J. Augenstein, Pearson Education / PHI.

ENGINEERING DRAWING :

1. Engineering Drawing, N.D. Bhat, Charotar.
2. Engineering Drawing and Graphics, Venugopal, New Age.
3. Engineering Drawing, Basant Agrawal, TMH.

To know more about BTech visit the link below:

https://dqxeclau.top/courses/b-tech-bachelor-of-technology

I hope this answer helps. All the very best for your future endeavors!