
The first book I bought was How to Carve Wood by Richard Butz. It was simple enough for a beginner but had many interesting projects involving all kinds of carving. Any of the books by L.S. Irish are good for relief carving, be sure to visit her site:
www.carvingpatterns.com. Any book by Harold Enlow will give you good patterns for caricatures. Check out the book department on this website, too.