A. J. Lees is a professor of neurology at the National Hospital, London. He is the recipient of numerous awards, including the American Academy of Neurology Lifetime Achievement Award, the Association of British Neurologists’ Medal, the Dingebauer Prize for Outstanding Research, and the Gowers Medal. He is one of the most highly cited Parkinson’s disease researchers in the world and is the author of several books, including Ray of Hope, which was short-listed for the William Hill Sports Book of the Year, and The Silent Plague.

James Grauerholz is a writer, editor, and the biographer and literary executor of the estate of William S. Burroughs.