@juergen_hubert@mementomori.social This one: https://www.hugendubel.de/de/ebook_epub/ursula_k_le_guin-a_wizard_of_earthsea-19607351-produkt-details.html is declared as "without DRM but with a watermark". Not all are DRM free, but at least they clearly state which ones are and which ones are not.