Auricular Kambo and Ear Acupuncture are different - Kambo's need not to encounter food in the stomach is paramount.
This is my favourite ear book:
AURICULAR THERAPY: A COMPREHENSIVE TEXT Auricular phases, frequencies, and blockages Bryan L. Frank, M.D. and Nader E. Soliman, M.D.
I have Ping Chen's book too but I find this one far more practical and easier to use.