Late yesterday I finished proofing that last of the three books in my Using and Administering Linux: Zero to SysAdmin series.
Although there may be a few more email discussions to clarify various notes I made on the proofs, for me, this project is essentially done. It has taken almost two years from my initial conception of the Linux self-study course that grew into this three-volume set.
As far as I can tell, we are still on track to have all three volumes published before the end of the year.
If you are interested in learning to be a Linux system administrator, this is the self-study course for you. I hope you will check it out. The link above takes you to my page for all three volumes which has links to Apress and Amazon where they can be purchased.