THE ROGUISH WORLD OF DOCTOR BRINKLEY (280 pp.)Gerald CarsonRinehart ($4.95).
It may be, as the late William Allen White observed while discussing the villain of this biography, that 20% of the people are permanently gullible. And it may be that White's figure is low. John R. Brinkley, a small, dapper, goateed North Carolinian, who seemed certain that society rests upon a thick substratum of cement-heads, combined elements of the demagogue and the religious faker, but above all he was a medical quackperhaps the greatest quack ever to barter colored water for cash. Author...