Trouble downloading Abode Digital Editions onto Macbook running Catalina 14.5

I have a MacBook Pro and am trying to download Adobe Digital Editions so that I can get an eBook from Libby onto my Nook. I am struggling to find a version of ADE that I can download. Is there a version that is downloadable onto Catalina 14.5, if not has anyone found anything that can get an ebook from Libby onto a Nook?