If you want to write with pleasure, there are WIKIS. We can write simple texts on WIKIPEDIA, WIKIO, WIKTIONARY or any other WIKI, according to the WIKI charter.
The license, generally distributed on this kind of websites, is the CREATIVE COMMON By SA. We become an author if we write with our WIKI account.
WIKIBOOKS makes it possible to diffuse a book, exporting his book in WIKIMEDIA on LIBRE OFFICE. His WIKI account then allows to become free author. Do not forget to put the source of your book on archive.org.
With a search you have done, improve the corresponding WIKI checking the rights, if you are not the author of the text to add ...