Digital Libraries:
* Project Gutenberg: A treasure trove of public domain texts, including many medieval works. [https://www.gutenberg.org/](https://www.gutenberg.org/)
* Internet Archive: Contains a vast collection of digitized books, including medieval manuscripts and printed editions. [https://archive.org/](https://archive.org/)
* HathiTrust: A collaborative digital library with a focus on academic materials, offering access to many medieval texts. [https://hathitrust.org/](https://hathitrust.org/)
* The British Library: Offers online access to digitized medieval manuscripts, including the famous Beowulf manuscript. [https://www.bl.uk/](https://www.bl.uk/)
* The National Library of Scotland: Hosts digitized medieval manuscripts and other historical materials. [https://www.nls.uk/](https://www.nls.uk/)
University Libraries:
* Many university libraries have online collections of digitized medieval books. Check their websites for digital collections or online catalogs.
* University of Oxford Bodleian Library: Offers online access to many digitized medieval manuscripts. [https://www.bodleian.ox.ac.uk/](https://www.bodleian.ox.ac.uk/)
* University of Cambridge Digital Library: Offers access to a wide range of digitized materials, including medieval manuscripts. [https://cudl.lib.cam.ac.uk/](https://cudl.lib.cam.ac.uk/)
Specialized Websites:
* Medieval Sourcebook: Offers a collection of primary sources for medieval history, including texts, images, and documents. [http://www.fordham.edu/halsall/](http://www.fordham.edu/halsall/)
* The Canterbury Tales Project: Provides a comprehensive online resource for Geoffrey Chaucer's Canterbury Tales, including translations, commentaries, and multimedia materials. [http://www.canterburytalesproject.org/](http://www.canterburytalesproject.org/)
* The Gutenberg Bible Project: Offers a high-quality digital facsimile of the Gutenberg Bible. [https://gutenberg.org/wiki/Gutenberg_Bible_Project](https://gutenberg.org/wiki/Gutenberg_Bible_Project)
Tips for Finding Medieval Books Online:
* Use specific keywords: For example, "medieval literature," "medieval poetry," "medieval history."
* Explore online catalogs and databases: Many libraries and digital archives have online catalogs that you can search.
* Look for websites dedicated to medieval studies: These websites often contain links to online resources for medieval books.
* Check copyright status: Many medieval works are in the public domain, but some may still be under copyright.
Remember to always respect copyright laws and give credit to the source of any materials you use.