The Obsidian Chamber (Agent Pendergast Series, 16)

A TRAGIC DISAPPEARANCEAfter a harrowing, otherworldly confrontation on the shores of Exmouth, Massachussetts, Special Agent A.X.L.

Pendergast is missing, presumed dead.A SHOCKING RETURNSick with grief, Pendergast' s ward, Constance, retreats to her chambers beneath the family mansion at 891 Riverside Drive--only to be taken captive by a shadowy figure from the past.