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The Obsidian Chamber

Agent Pendergast Series

This book can be downloaded and read in Apple Books on your Mac or iOS device.


New York Times bestseller


After a harrowing, otherworldly confrontation on the shores of Exmouth, Massachussetts, Special Agent A.X.L. Pendergast is missing, presumed dead.

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.

Proctor, Pendergast's longtime bodyguard, springs to action, chasing Constance's kidnapper through cities, across oceans, and into wastelands unknown.

And by the time Proctor discovers the truth, a terrifying engine has stirred-and it may already be too late . . .

From Publishers Weekly

Aug 29, 2016 – A melodramatic plot full of improbable developments mars Preston and Child's 16th thriller featuring FBI agent Aloysius Pendergast (after 2015's Crimson Shore). Pendergast is believed dead after he was seriously wounded and fell into the sea off Exmouth, Mass. Soon after Pendergast's ward, Constance Greene, returns from Exmouth, she's abducted from the Manhattan home she shared with the FBI agent. Proctor, Pendergast's factotum, embarks on a lengthy and convoluted quest to rescue Constance, which takes him to the Kalahari Desert. Proctor's resolve is strengthened by his belief that Constance's abductor is Pendergast's evil brother, Diogenes, who was thought to have died after Constance tossed him into a volcano more than three years earlier. Meanwhile, a sophisticated villain who maintains a secret identity believes that his DNA at a crime scene won't be matched to a sample in the FBI database because that sample will also be a match for his alias. This entry lacks the originality and chills of the better books in this bestselling series.

Customer Reviews

Not up to the standard

The first half of the book or so doesn't even have Pendergast really, it's a dry recitation of a cliched race. There are several uncharacteristic plot glitches where things don't fit together.

For example - at one point the car is left at a specific location. Much later PEndergast returns - and the car has somehow mysteriously made its way back home. It’s location would have been key to his investigations. Very sloppy.

The ending is also a letdown.

Coming off of Crimson Shore this was quite a letdown.

Finished with this series

This book ends my desire to read any more Pendergast novels. I have read and loved every single one and have felt they really have had to stretch here to continue this story line that should be behind us. Plots are recycled at this point and this book spends way too much time recounting the past. They should really stick to introducing new and unique mysteries to solve, that is what we love about this series. Instead, they bring back his brother that should be dead. A volcano!! Really? I didn't even want to continue reading as soon as Diogenes entered the story. The ending leaves me quite angry as it is just ridiculous. I do not recommend this book.

Another great read!

I absolutely hate the fact that I read so fast. Finished this in two days. Now I have to wait for however long for the next one to come out to find out what happens. I will say though it would of been interesting to see where Constance and Diogenes would of gone. Maybe the next one will include a little bit more of D’Agosta.

The Obsidian Chamber
View in iTunes
  • $9.99
  • Available on iPhone, iPad, iPod touch, and Mac.
  • Category: Police Procedural
  • Published: Oct 18, 2016
  • Publisher: Grand Central Publishing
  • Seller: Hachette Digital, Inc.
  • Print Length: 416 Pages
  • Language: English
  • Series: Agent Pendergast Series
  • Requirements: This book can only be viewed on an iOS device with Apple Books on iOS 12 or later, iBooks 1.5 or later and iOS 4.3.3 or later, or a Mac with iBooks 1.0 or later and OS X 10.9 or later.

Customer Ratings

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