I am very glad to find this site! My mother and my cousin have been bottle digging for some time now but they recently got me started on it and now I am addicted. Just last night they found 90 bottles all in good condition; no chips or cracks even. Most look to be from around the 1930s-1940s. Im wondering if there is a book that someone would recommend to help determine age of bottles, etc? Any help would be greatly appreciated.