The LUGBZ freely provides the two excellent GNU/Linux Starter Guides by our member Andrea Congiu written in Italian. The two works, released under CC-BY-SA, are not limited to one particular distribution, but cover a huge bunch of them including Mint, Ubuntu, Lubuntu, Fedora, Puppy e Mint.
The download links to the PDFs:
Notice: The manuals get updated on a regular basis, so please re-check for updates. For enhancements and errata please contact Andrea Congiu over the LUGBZ’s email address firstname.lastname@example.org. On request he also leans hard-copy editions of them.