Ebook Friendly’s Piotr Kowalczyk provides an updated list of sites that offer free public domain books in electronic and audio format. Piotr writes:
Every year new publications enter public domain. That means their intellectual property rights have expired or are not applicable any longer. The content of these works becomes available for public use. Anyone is free to use it – but also to reuse it, for instance publish a new edition. Therefore you may find in major ebookstores (Kindle, Nook, Kobo, iBook Store, or Google Play Books) public domain books that are not free. My advice is that if you want to get an ebook version of a classic novel like Pride and Prejudice, you should first check out the sites listed below. Browsing the ebookstore where you have an account is a next step, if you don’t find what you’re looking for.
Here’s a sampling of sites provided:
1. Project Gutenberg – Project Gutenberg is a top destination for free ebooks on the web. It’s [the] first ebook initiative in the world, established by Michael S. Hart in 1971.
2. Europeana – Europeana offers access to millions of digitized items from European museums, libraries, and archives.
3. Digital Public Library of America – DPLA is aimed at giving universal access to digital resources of American libraries and archives.
4. Internet Archive – The website is a huge repository of text, audio and video files, including public domain titles. You can browse and read online over 5 million books and items from over 1,500 collections.
5. Open Library – The site is a project of the Internet Archive and is intended to create “one web page for every book ever published.”