Hi Steve,
the O'Reilly bash book is a good start:
http://safari.oreilly.com/JVXSL.asp? x=1&mode=section&sortKey=rank&sortOrder=desc&view=book&xmlid=0596009658& g=&srchText=bash&code=&h=&m=&l=1&catid=&s=1&b=1&f=1&t=1&c=1&u=1&r=&o=1&n =1&d=1&p=1&a=0&page=0
but as far as a general Unix admin book, i don't think you'll go wrong with one of the Nemeth books:
Ok, I'll try check them both..and thanks for the links,
Thanks and Regards, ijez