Need Advanced (??) Unix Text

[John Antypas]

Perhaps I can get some more help from the net -- or at least I generate
a ton of controvery again.  (Every time I ask a question I see my 
question for about a month!)  I'm not a Unix guru, but I'd like to learn the
finer points about the Unix (both BSD and USG).  

What are good references for sorcer's apprentice?
I already have "The Design of" and "Unix Device Drivers", and of course the 
famous manual sets.

Thanks