these copies were free pdf at some source lol!Thanks for sharing, Tobey.
You may find some useful resources here, too.
https://www.linux.org/threads/linux-learning-resources-share-yours-too.27866/
Cheers
Wizard
It becomes an addiction I promise. lolI'm starting to learn Linux, and now I found this article lol. thanks for such a set of books, it will be interesting to read