The Obsidian Chamber (Agent Pendergast)

Publisher's Summary A Tragic Disappearance After a harrowing otherworldly confrontation on the shores of Exmouth, Massachusetts, Special Agent A.X.L. Pendergast is missing, presumed dead. A Shocking Return Sick 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 Manhunt Proctor, Pendergast's longtime bodyguard, springs to action, chasing Constance's kidnapper through cities, across oceans, and into wastelands unknown. But in a World of Black and White, Nothing Is as It Seems And by the time Proctor discovers the truth, a terrifying engine has stirred - and it may already be too late.... ©2016 Douglas Preston and Lincoln Child (P)2016 Hachette Audio