IIT Kharagpur has created National Digital Library for students for all subjects. Below is the link :
It contains 4 crore 6O lakh books.
For more details : Best Online Coaching for Civil Service_IAS_ UPSC_IFS_IPS,
Free Study Material ENSEMBLE IAS ACADEMY
Call +91 98115 06926
Visit us:- https://ensembleias.com/
Online Store: https://online.ensemble.net.in/
Email: ensembleias@gmail.com
Source: ndl.iitkgp.ac.in.
