NDLI - National Digital Library of India is an MHRD initiative. Itâs an app that lets you download papers, articles, books according to your interest. Gutenberg is another app where you can download e-books for free. There are various websites like Open Library, Archives and LibGen thatâll let you download e-books for free. Iâd suggest you to look for a PDF of the book that you want to read on Google. Chances are you might find it on the first link you open! Happy Reading! .)