Back to book Explore the story world Reference profiles for The Last Secret All (1) Characters (1) Characters Meet Daniel Mercer Meet Daniel Mercer: investigative journalist, professional troublemaker, and a man who has never encountered a suspicious death he could leave well enough alone. In Blackwood, that particular habit could get him killed. Characters Meet Daniel Mercer Meet Daniel Mercer: investigative journalist, professional troublemaker, and a man who has never encountered a suspicious death he could leave well enough alone. In Blackwood, that particular habit could get him killed.