The renowned library system of the University of Oxford houses precious manuscripts, ancient books, historical archives, as well as digitized collections.
Bodleian Library, University of Oxford
Click the "Visit Site" button on this page to open the official Bodleian Libraries website, then follow its on-screen instructions.
Bodleian Libraries is accessed online through your browser, so there is usually no local installation. Refer to its official site for details.
You can browse comparable reading sites under the e-books category on this site and pick the one that fits you.