ok you want titles right?
anything by the authors Michael and Lesley Tierra, and anything by Rosemary Gladstone.
Encyclopedia of Medicinal Plants, Andrew Chevallier
The Consumers Guide to Herbal Medicine, Steven B Karch, MD
The Illustrated Book of Herbs, Their Medicinal and Culinary Uses, Gallery Books (this is an older one, may not be able to find it)
Indian Herbology of North America, Alma R Hutchens
Natures Medicines, Richard Lucas
A Concise Guide in color to Herbs, this one has a list of contributors.
These last two are the ones I take with me on every camping or hiking trip. I have many, many more in my collection but this should get you going.