How about a project Gutenberg "best of" CD full of free public domain ebooks?
Download page: https://www.gutenberg.org/ebooks/11220 Link directly to download: https://www.gutenberg.org/files/11220/PG2003-08.ISO
They also had a dual layer DVD download if you want something bigger. They don't seem to host it anymore, but archive.org does.
German.
I will not be taking follow up questions.