I'd suggest Simmons Using the View Camera for a primer. A Crown Graphic is not a field camera and while it is an excellent camera it won't do all that field a field camera can do. However is does offer an entry into LF at a reasonable cost and will give you the flexibility of shooting handheld. I think a Super Graphic will provide quite a bit more in the movement department if that is in your budget.
The LF Homepage in zach's link above is a wealth of information (check out the article on processing 4x5 in an old Unicolor) and if you're keen on Graflex cameras then www.graflex.org is a great place to visit.
Have fun!