There are non-public-domain ebooks out there without DRM. Kobo sells some, for example, though you have to check the format before purchasing since they aren't

There are non-public-domain ebooks out there without DRM. Kobo sells some, for example, though you have to check the format before purchasing since they aren't all DRM-free. Libreture has an extensive list of DRM-free ebook shops[1]. [1] https://www.libreture.com/bookshops/ https://www.libreture.com/bookshops/