Mark Nesbitt is a former National Park Service Ranger/Historian. He started his own research and writing company in 1977 and has done research and advertising copy for some of America's best historical artists. Mark is the author of several books on the Ghosts of Gettysburg and his stories from the Ghosts of Gettysburg Book series spawned the commercially successful "Ghosts of Gettysburg Candlelight Walking Tours" in 1994. The tours continue to entertain hundreds each night from March through November. In addition, many of his stories have been seen on numerous television programs and specials.