Blue Labyrinth (Pendergast Series #14)

When a longtime enemy shows up dead on Pendergast's doorstep, the murder investigation leads him into his own dark past as a vengeful killer waits in the shadows.

It begins with murder. One of Pendergast's most implacable, most feared enemies is found on his doorstep, dead. Pendergast has no idea who is responsible for the killing, or why the body was brought to his home. The mystery has all the hallmarks of the perfect crime, save for an enigmatic clue: a piece of turquoise lodged in the s...