I have Mr. Brown's book and have spoken to him several times,he seems like a nice guy and helpful. I have built several double rifles using much of hi info though I do some things in what I feel are better ways, just my opinion. His book is very worth while and has lots of good info in it. My own double is a 450#2 N.E. built on a French action and way back I did a thread on building the rifle. It will be on my web site rather soon and will be able to be found at customguns.us