I am Larry Robbins,M.D., author of a number of headache books; this latest, Advanced Headache Therapy, has hundreds of clinical pearls and guidelines for various headache treatments, including sections on "what to do when nothing works". I wrote this for doctors and patients, honing in on advanced treatments for difficult to treat headaches. I am a neurologist/headache specialist in Riverwoods, Ill, just N of Chicago; http://www.chicagoheadacheclinic.com . I have written/co-written over 250 articles/abstracts, mostly on headache(and associated topics), and 3 previous headache books(all best sellers).