The edge / David Baldacci.

Former Army Ranger Travis Devine has now been recruited by Homeland Security to serve in their Office of Special Projects. Summoned to Virginia by Emerson Campbell to investigate the murder of a young woman, Devine quickly learns that this case is more personal than most. Four days earlier, Jennifer Silkwell was found dead on the rocks of the Maine coastline. A high-ranking analyst for the CIA, she had knowledge of national security secrets that would be valuable to a number of enemies. And her senator father twice saved Emerson Campbell's life. Knowing how much is riding on the case, Devine packs his bags and heads for the small town of Putnam in Maine. But small towns can harbor big secrets, and not everyone wants to share them with outsiders. Not when there's a killer on the loose...