Garisson Weyland is the author of In The Shadow of Paracelsus: Exploring the Mind of James Lynwood Prescott, and an unseen antagonist in Chase's life.
Little is known about the author as he has not yet been seen in the series. He has alternatively been called a genius and a hack tabloid reporter. The truth, as is often the case likely lies somewhere in between. Based on anecdotal evidence, it seems that Weyland was an investigative journalist obsessed with James Lynwood Prescott and his death at the hands of Chase Quinn.