While I was removing material under the cheekpiece, a portion of the wood pulled out and I ended up about 3/16ths lower than I had intended all the way back to the buttplate. I left the area behind the cheekpiece at the original level. I now have a very nice area to do some kind of decorative carving. I have no clue about relief carving. What is the best book or online source to learn about relief carving? Thanks in advance for any help you can provide!