Ned and Nancy track down a ghostly saboteur in the twenty-third book in the Nancy Drew Diaries series, a fresh approach to a classic series.Nancy and Ned are visiting Coffin Hall, an estate turned rare books library, doing research on the library&’s rumored ghost for an episode of the NedTalks podcast when a fire breaks out in the records room. One of the library&’s security guards accuses Ned of arson—after all, he was the only one in the room when the fire started—but Ned swears it wasn&’t him. He was trying to stop the fire. He tells Nancy he saw a lady in blue right before the incident, and thinks it was Henrietta Coffin, the ghost of Coffin Hall! Nancy is confident her boyfriend is innocent, and she&’s determined to identify the real culprit, though she&’s pretty sure it wasn&’t of the paranormal sort. When she investigates further, she learns that the fire was just the latest in a string of recent strange and inexplicable incidents plaguing Coffin Hall. It&’s increasingly apparent that someone has more than a passing interest in shutting down the library. But who—or what—is responsible? And why?