To outsiders, the Strongs were a wealthy Princeton family, whose members were among the industrialist elite of New Jersey. But Thaddeus Strong, the founder the dynasty, made his fortune through lies, greed, treachery, and the manufacture of ever more lethal weapons.

The Hidden Ally follows his family’s journey from the Civil War to World War II, as his descendants try to undo the damage he has done and penetrate a dark family mystery before its solution is lost forever.