| Open Library | https://openlibrary.org/ |
| Library at James Sprunt Community College | https://jamessprunt.libguides.com/ebooks/ol |
| Open Access Library - Free Access to 5,731,246 Academic Articles | https://www.oalib.com/ |
| ManyBooks - General books are available | https://manybooks.net/ |
| BookYards - Free books are available | https://www.bookyards.com/en |
| PDF Books World - Free books are available | https://www.pdfbooksworld.com/ |
| Project Guternberg | https://gutenberg.org/ |
| ManyBooks Library | https://manybooks.net/ |
| Google Books Library | https://g.co/kgs/qxGsjQV |
| Ketabton (Pashto and Dari) | https://ketabton.com/ |
| Any Field | https://www.libgen.is/ |
| Open Stax Library | https://www.Openstax.org/subject |
| Any Field Textbook | http://ensani.ir/fa |