I found a copy of this book for cheap:
http://www.amazon.com/Illustrated-Di...2426962&sr=1-1
It'll tell you pretty much what you want to know about any class you can think of. Good to read while your computer loads up your modded game.
I also features a unique, electricity-free interface that operates independently of batteries or power cables. Further, it doesn't tax your system resources, so you can multitask without adversely affecting your load time. It's also transportable...don't want to wait in front of your machine while it loads the entire Pacific? Head out to the porch, read up, and enjoy a cold beverage.
Books: Handheld Entertainment Since...Well, A Really Long Time. (tm)