Folk, I noticed today that I spend an average of 3 hours a day stuck on a subway train. Idle time that's good for nothing, except to read a newspaper or a book. And that's why I am writing today:

Which book would you recommend to a Tech Support Rep, who wants to learn more about Linux? I've got Knoppix HD-Install done in no time thanks to a fantastic tutorial I found searching this site, but now I want to learn more... lots more.

So what I am looking for is a good introduction, with loads of details, but still simple enough for me to understand?

I found announcements about "Moving to Linux: Kiss the Blue Screen of Death Goodbye!", but surely there must be other books around BTW...

Your feedback is very welcome, after all we all know what RTFM stands for...