Digital Libraries with Books, e-Books and Audio-books for Free

The World Wide Web offers many digital libraries, and some of them provide works for free.  These are works that are into Public Domain or were freely released by their authors.  Here is a compilation of digital libraries that offer Books, e-Books and Audio-books for free.  Please notice that some of them offer priced works too.

• 24symbols - Access a world of books
• 50,000+ Free eBooks in the Genres you Love | Manybooks
• Bibliomania - Free Online Literature and Study Guides
• Books on Google Play
• Europeana Collections
• Free Books : Download & Streaming : eBooks and Texts : Internet Archive
• FreeBookSpot | Download e-books for free
• Google Books
• Gutenberg
• LibriVox | free public domain audiobooks
• Online Books, Poems, Short Stories - Read Print Library
• Public Domain | Feedbooks
• The Literature Network: Online classic literature, poems, and quotes. Essays & Summaries
• UFDC Home - Baldwin Library of Historical Children's Literature
• Welcome to Open Library | Open Library
• Wikisource
• World Digital Library Home