Books like The Obsidian Chamber
Lincoln Child, Douglas Preston
The Obsidian Chamber is 407 pages, about 7 hours 28 minutes at 250 words a minute.
12 books to read next
How long each takes
Cold Vengeance 6.8 h 
Two Graves 10.1 h 
Killing Floor 9.2 h 
Cemetery Dance 10.6 h 
Hour Game 8.7 h 
White Fire 10.5 h 
The Firm 1.4 h 
Simple Genius 7.9 h 
Last Man Standing 11.2 h 
Dark Rivers of the Heart 10.6 h 
Tom Clancy's Op-Centre 7.3 h 
The Last Mile 8.6 h Bar height shows length. Estimated at 250 words a minute.