I have a hard cover "While The Billy Boils" published in 1913. How do I find out how much it is worth? And who might be interested in it? It's almost 100 years old for goodness sake. It has an embossed maroon cover. Unfortunately the outside of the spine has come off, but front and back covers are pretty good. Pages are quite good too, just yellowed with age. I doubt any pages are missing.