I'm reading: 'Fifty Years of Collectible Fashion Jewelry, 1925-1975'. Lillian Baker. CB. Values updated 2001. 'Costume Jewelry, Identification and values'. Cherri Simonds. CB. Values updated 2005. 'Costume Jewelry, The Complete Visual Reference and Price Guide'. Judith Miller. DK. Collector's Guides. The bottom one is my favorite. My dad sent me the books as gifts. I'd like more detailed history on materials, workmanship, techniques, social/historical information. The last one covers that best but now I'm hungering for more in dept information. Costume jewelry and music are my main vintage interests. I can't remember which thread I posted my jewelry on. I posted them in small so you could click on them and view them larger. None are of special value. My dad and I think it's safest if he max. pays $25 a piece until we develope some expertise knowledge. I'm not sure all of the sellers have been especially knowledgeable on the subject either.