DR. PETER BLACK has served as a physician to Congress, professor of neurosurgery at Harvard, and president of the World Federation of Neurosurgical Societies. As an academic neurosurgeon, he has written a dozen books, authored hundreds of professional papers, and formed lasting friendships across the globe. Dr. Black now writes medical fiction from his home in the greater Boston area. Death by Denial is his second Duncan MacGregor thriller. Be sure to read Seizure, his first. You can find him on the web at peterblackbooks.com