1. WORLD DIGITAL LIBRARY
One of the best free online libraries on the internet. The initiative of the Library of Congress of the United States and UNESCO, created in 2009 with the aim of promoting international understanding and knowledge.
2. EUROPEAN DIGITAL LIBRARY
This library in Europe contains more than two million links to different content. In addition to texts, the site has paintings, maps, music, and some movies and television programs.
3. BIBLIOMANIA
Dedicated especially to lovers of books and knowledge. In this platform, users can access thousands of literary, dissemination and academic books.
4. DIGITAL LIBRARY OF THE IBEROAMERICAN HERITAGE
Highly recommended library for students and teachers of all careers. This platform brings together books from the national libraries of different Latin American countries.
5. CYBER LIBRARY
It is the largest virtual library in the world. In it, users can find thousands of literary, scientific and technical texts, among others.
6. PROJECT GUTENBERG
This project brings together thousands of texts of all types and genres, under the sole condition that they are in the public domain. You can find books, academic texts, and documents of all kinds.
7. International Public Library
This is our library of resources, so we thought we shoud mention it on the list
8. Public Domain Books
This is another free online public library in this link you will find an incredible list of up to 1000 publications of public domain books in PDF: literature, philosophy, science, history, sociology, and much more.
9. Free Books on Amazon
From time to time, the Amazon.es e-commerce platform makes available to the public a large number of digital books to download for free.
10. PDF Novels in English
And here we have a compilation of works of classical literature in English to download in PDF format. Ideal for students of the basic-intermediate level.
11. Many Books
Many Books is a platform where you can access more than 50,000 free eBooks. A very simple and clean page that provides the user with a pleasant book search experience to download for free.
12. Mega ePub
Mega ePub is another web portal to find free books. Here you will find a complete list of ePub books that you can read at any time. They also have books in Kindle format.
13. Online Computer Books
Through Online Computer Books you can access an extensive directory of free books that deal with topics related to computer science, software engineering, web design, mobile application development, networks, databases, information technology, artificial intelligence, graphics, and computer hardware, etc.
14. Planet Book
Planet Book is a web portal where you can access more than 9,000 public domain books to read on your phone, tablet or ebook reader legally. Through its main page, they show you which are the most searched books or most recommended books of the moment.
15. Wikisource
Wikisource is a Wikipedia project that aims to create a library of royalty-free original texts. You can find the books in .pdf format. The Wikisource website has a design that looks like you’re browsing Wikipedia itself.
16. Book Depository
Book depository is a web portal that has more than 37,000 free books to download in addition to audiobooks and other documents. The themes you can find on this website are very varied. They have the main menu where you can access the latest books added, the most downloaded books, or read comments and view votes. You can find books in Pdf, Word, Html, Txt, Rtf, Chm, Epub and Exe format.
17. Scribd
These free online libraries are very common and thousands of students use them on a daily basis. Scribd sites are also one of them where you can download free books in PDF, ePub or Ebooks format. Commonly known as a platform to share documents. You can download and upload your documents so that others can also take advantage of your documents.
18. Free eBooks
Free eBooks is a web portal where you can find thousands of free books to download from various categories in English. In addition, you can also find academic books and educational texts.
19. Free Editorial
Free Editorial is an online publisher and library, which brings together readers and writers from around the world. Through its website, you can access to download books for free, without any registration and it offers you the option to download them in various digital formats.
20. Free ePub
ePub Libre is a platform where you can access more than 37,000 free books to download in ePub format. News is added every week. In addition, this web portal also has sections where you can read the comments on the different books and even share opinions on their forum.