Milady's Skin Care and Cosmetic Ingredients Dictionary by Natalia Michaluh
A Consumer's Dictionary of Cosmetic Ingredients by Ruth Winton
I would say that the best place to find these books would be on Amazon.com. I do not think that the local bookstores would care these, but you can check. If they do not, they may be able to place an order for you.
It would be interesting to carry these books around with you to see what are really in some of our cosmetic products.