Help > Adding Open Library
Open Library is a free, open, editable catalog with a goal of having a page for every book ever published. The site provides access to many books that are no longer under copyright.
Start by clicking on the icon of the stack of Library books in your browser.
Near the bottom, notice that there is a scrollable box with a 'yellow' background. All special catalogs are found in this box.
Scroll to Open Library and click on Add Open Library to add Open Library to the Library Extension.