Open Library is a project of Internet Archive. Many books are available to be checked out as an ebook. It is free to create an account.
Here are a few related to biblical studies that are available for checkout from Open Library:
 

If you are looking for a book that the Library only has in print, you can see if the book is in Google Books. Google Books offers portions of published books in full text. By law, they don't show the whole book, but there may be parts of the book you need available. And the book is fully searchable. https://books.google.com/

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Globethics.net is a global network of teachers and institutions with the vision to embed ethics in higher education. The founding conviction of Globethics.net is that having equal access to knowledge resources in the field of applied ethics enables individuals and institutions from developing and transition economies to become more visible and audible in the global discourse.

The Library contains books, journals and other resources in many different languages.

https://www.globethics.net/library

Open Access is a new emphasis by libraries and publishers to offer scholarly resources that are not under copyright and have "open access" by anyone. The Open Access Digital Theological Library offers books, commentaries, and open access journals freely to the public. This is a good place to check if you are having trouble finding the sources you need.

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This Google custom search engine allows you to find full-text articles in hundreds of religious, open-access online journals and other periodicals. Search TJS either by using the quick search box above or by going to the TJS opens new windowWeb site. For more information about TJS, click opens new windowhere.