- Public Domain: Works first published before January 1, 1923 with proper copyright notice entered the public domain no later than 75 years from the date copyright was first secured. Hence, all works whose copyrights were secured in the US before 1923 are not in the public domain, regardless of where they were published.
- Creative Commons License: Every license helps creators retain copyright while allowing others to copy, distribute, and make some uses of their work — at least non-commercially. Every Creative Commons license also ensures licensors get the credit for their work they deserve.
| eBook Provider | Copyright | # of Titles Offered | Content/ Genres | Equipment required to view |
|---|---|---|---|---|
| Many books | Public Domain and Creative Commons | More than 50,000 | Fiction/ Nonfiction | PC Mobile Devices |
| Project Gutenberg | Public Domain within the U.S. | 75,000 | Classics/ Fiction/ Nonfiction | PC Mobile Devices |
| Digital Book Index | Public Domain | More than 165,000 | Classics/ Nonfiction | PC iPad Kindle Nook |
| IMSLP/ Petrucci Music Library | Public Domain | 835,426 Scores | Sheet Music | PC |
| Epub Books | Public Domain | 100’s of Books | Classics/ Fiction/ Nonfiction | PC Mobile Devices |
| Free-eBooks | Public Domain | More than 50,000 | Classics/ Fiction/ Nonfiction | PC Mobile Devices |
| Amazon eBooks | Available with membership | More than 100,000 | Fiction/ Nonfiction | Mobile Devices |
| OER Commons | Public Domain | More than 50,000 | Nonfiction/ Textbooks/ Lesson plans/ Worksheets/ Activities | PC Mobile Devices |
| Open Library | Public Domain and Creative Commons | More than 20,000,000 | Fiction/ Nonfiction/ Textbooks | PC Mobile Devices |