Many websites offer free downloadable eBooks. Most of these eBooks are free because they are no longer under copyright and therefore in the public domain. Some eBooks are free because the author chooses to allow them to be freely available.
For more free eBook websites, see this Wikipedia article.
Inkmesh is a search engine for eBooks that covers multiple sites including Amazon.com, Barnes and Noble, the Internet Archive, Powells.com, Project Gutenberg, Sony eBook Store, and many more. You can search for free eBooks, compare prices of those for sale, or browse by subject.
Founded in 1971 by Michael S. Hart, Project Gutenberg is the oldest digital library. Project Gutenberg is a volunteer effort to digitize and archive cultural works and to encourage the creation and distribution of eBooks. Most of the items in its collection are the full texts of public domain books.
The Romance book publisher, Harlequin, offers free eBooks that can be read in a browser window. eBooks are also available for purchase.
AddAlleBooks also lists Harlequin eBooks that become free for a limited time.
Free eBooks mostly in PDF and EXE format. It provides a search tool for discovering free eBooks and magazines to download. Free-eBooks.net requires a membership, however there are several membership levels including a free one. The site also supports a method of self-publishing and sharing your work online.
Search for eBooks in a variety of formats. Downloading requires a Google account. Beyond simply searching, the Google Play Free also provides a way to organize your eReader content, as well as a central place to access your downloads from anywhere. Browse free eBooks by clicking on "Top Free" from the main books page.
The book search works just like a web search. You can search on Google Books or on Google.com. When a book is found with content that contains a match for your search terms, it shows up as a link in your search results. If the book is out of copyright, or the publisher has given permission, you'll be able to see a preview of the book, and in some cases the entire text. If it's in the public domain, you will be able to view a plain text version on your screen or you're free to download either a PDF or an ePub copy. Google has also launched a free eBook Reader for mobile devices. Go to books.google.com/m and browse. Through the Google Books Library Project collections of several major research libraries are also searchable though Google Books.
Google Scholar is a freely-accessible web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines. It includes most peer-reviewed online journals of Europe and America's largest scholarly publishers. NOTE: Because most of Google Scholar's search results link directly to commercial journal articles, a majority of the time users will only be able to access a brief summary of the articles topics, and small amounts of important information regarding the article, and possibly will have to pay a fee to access the entire article.
With over 2,5000,000 items and counting, the Internet Archive Text Archive has a variety of fiction, children's books, and historical works that are either out of copyright, or have a Creative Commons license. View titles online or download for eReader devices or applications. All content is free.
Comic Book Plus requires registering for a free account to download comics. All comics are in the public domain.
ICDL supports the world's children by making the best in children's literature available online free of charge. The Foundation pursues its vision by building a digital library of outstanding children's books from around the world.
ManyBooks.net contains more than 29,000 eBooks available for Kindle, Nook, iPad and most other eReaders, and they're all free!
Publishers choose to make only certain eBooks lending-enabled. If you own a lendable eBook (they're labeled as such), you can loan it to one person, one time, for 14 days. Both Amazon and Barnes and Noble have eBook lending options on their websites that allow lending to people you already know (you just need their email address), but the following sites allow you to lend and borrow books from people you do not know.
BookLending.com is a website that matches lenders and borrowers of Kindle ebooks. To participate in lending and borrowing Kindle books, you must first register as a user on the site.
Lendle is an easy, fast, and fair way to lend and borrow Kindle books. Amazon allows for lending of Kindle books to people you know. Lendle bridges the gap so that you can also lend and borrow from people you don't know!
Lending Library from Open Library requires a free membership and a user profile. Open Library is an online cataloging initiative linked with the Internet Archive, and together they have partnered with OverDrive to provide a searchable online eBook lending library.