I don't have much on the way of firearms related reading material, but I do have a few close quarters defense books. One of the better ones I have read is Combatives for Street Survival by Kelly McCann.
If you are a talker, look into the "Verbal Judo" technique. There are a bunch of books, tapes/CDs and lecture materials out there. The way you converse with the contacts you make will almost always determine the outcome of your situation. I have been through the training, and it certainly helps.