A book I've found really helpful for Red Hat is a book called
Using Linux, written by Bill Ball. It is a great book for beginners (If there is a category that comes before newbie, then thats what I'm in. And I can understand it). Problem is it is a few years old, specifically for redhat 5.0, but they might have a newer revised edition. The publishers are Que, try a search of there website and see.