The Obsidian Chamber

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.AN INTERNATIONAL MANHUNTProctor, Pendergast's longtime bodyguard, springs to...