Fantastic article and awesome that I was JUST looking at these books earlier today and thinking of checking them out as I'm a Sys Admin that has been learning on the job for the past five years with no real mentor to teach me how I should be doing things, and it would be nice to read something like those books to make sure I'm on the right path.
Need to get him in for a session at SpiceWorld!
I've only read the Time Management one, and IMO, you must read it.