Terry, I agree with you that the four books you mentioned are the basic must haves. They are all great. The one thing the club needs is one central numbering system. Can you imagine 10 years from now. If we go unchecked, we will have dozens of books, tens of thousands of chips and dozens of different numbering systems. Nearly all chip collectors use a spreedsheet or a specialty software program to print out their valued collection. It is mind boggling to research many books or sources to come up with a number. Why not a numbering committee????