The author's writing style is a breath of fresh air. I've enjoyed his Absolute OpenBSD book in the past, and am looking forward to the revised edition. Michael W. Lucas is a master of presenting the material in an easy to read and comprehend format that is both entertaining and informative. This ebook is no exception.
I did note a couple of errors in the ebook I downloaded. While reading about the print version, I note that the author mentions "all known errors have been corrected," so I can assume these have been addressed. The errors were minor details and a quick trip to google resolved the issue when trying to determine why the particular item I was trying did not work as written.
This is a must have for the bookshelf for any serious sysadmin, network admin, or IT security professional, in my not so humble opinion. 6 stars out of 5 (except SmashWords won't let me vote that high.)