An after-thought from the on-line resources thread. I know I have half a gazillion ref books; 2/3s are on jewelry. Some I go back to time after time. Some are so poorly organized they're hardly worth owning. Some date pieces, some show the backs. Each has pros and cons. And I bet we have differing opinions on them too!
Let's get a resource started here with books. Rather than just a list, though, I think it would be even more helpful if we talk about what we found (or didn't find) helpful etc.
For example: I just got an old copy of Lillian Baker's "50 years of costume jewelry: 1925-1975". If you buy it thinking it's a even-handed decade by decade review, you're in for a bad shock.
But if you buy it knowing that
1). Almost everything is from 1950-1970,
2.) 1/4 of the photos are B&W
3.) Much of the jewelry is the less expensive kind like coro, emmons & SC
and 4.) of course it's at least a couple decades old,
you will own a lovely review of 25 years of the most common styles of the most common brands of costume jewelry you will likely find plus a comparison of the less expensive things to similar more expensive maker's pieces.
I read all the reviews on Amazon & decided the $4 plus $4 shipping was worth it. Wouldn't pay much more for it though unless I was a collector of those specific brands.
Maybe you want to list a few books & just talk about 1. That works too. Let's dig in!! Can't be much better to do over the holidays than curl up with a good book on vintage jewelry!!