If I don't write down what books I've found in the GIA library that I'm going to probably want to look into again later, I will probably forget their names and not be able to find them again. I am a little upset because I lost the name of one of the books I wanted when my laptop's hard drive crashed. So they are going here for safe keeping.

The Jeweler's Directory of Gemstones: A complete guide to appraising and using precious stones, from cut and color to shape and setting   by Judith Crowe
It is a good overall book, with pretty pictures, interesting ideas, lots of basic information that isn't necessarily easy to come by all in one place, and a rare thing: it talks about appraisal values.

Working with Gemstones: A Bench Jeweler's Guide   By Arthur Anton Skuratowicz & Julie Nash
Straight forward. More in-depth than The Jeweler's Directory is. And the authors both earned GG's and GJ's from the GIA, and taught there. Definitely a worthwhile book.

Professional Goldsmithing: A contemporary guide to traditional Jewelry Techniques   By Alan Revere The Revere Academy of Jewelry Arts
I've only glanced through it so far, but it looks beautifully complete. This, The Complete Metalsmith, and Goldsmithing and Silverwork are the main books that seem to be recommended for getting a good understanding of the different jewelry techniques. (I already own the latter two, though The Complete Metalsmith is on loan and I haven't seen it in a couple of months)

And I haven't had the chance to see these yet, but this series has been recommended as well:
Diamond Setting, Channel Setting Diamonds, Bead Setting Diamonds  all by Robert Woody.
It worries me that they are all diamond specific, since that is the hardest stone, and obviously different precautions will need to be taken for softer stones. But one of my instructors said that this series covers virtually all the stone setting styles.