Deep beneath the Ural Mountains, in an underground city carved out by slave labor during the darkest hours of the Cold War, ancient caverns hold exotic and dangerous life-forms that have evolved in isolation for countless millennia. Cut off from the surface world, an entire ecosystem of bizarre subterranean species has survived undetected—until now.

Biologists Nell and Geoffrey Binswanger barely survived their last encounter with terrifying, invasive creatures that threatened to engulf the planet. They think the danger is over until a ruthless Russian tycoon lures them to his underground metropolis, where they find themselves confronted by a vicious menagerie of biological horrors from their past—and by entirely new breeds of voracious predators. Now they’re rising up from the bowels of the Earth to consume the world as we know it.

USA Today praised Warren Fahy's debut novel, Fragment, as “a rollicking tale [that] will enthrall readers of Jurassic Park and The Ruins.” Now Fahy sets off an even more thrilling stampede of action and suspense, bursting forth from the hellish depths of...Pandemonium.

“Warren Fahy’s Pandemonium is pure genius, an otherworldly wonder as creative as the best of Jules Verne. Here is riveting scientific speculation paired with bravado storytelling. I want more!”
—James Rollins, New York Times bestselling author of Bloodline

“What do you get when you cross Jurassic Park with an ancient underground city? The answer is Pandemonium, an exciting read from thriller author Warren Fahy.”
—Steve Alten, New York Times bestselling author of Meg and The Loch

“Warren Fahy's new novel Pandemonium is probably the best high-tech thriller I've read since The Mote in God’s Eye. My heart was pounding (literally) from page one. Can't wait for his next tale.
—David Hagberg, New York Times bestselling author of Castro’s Daughter 

“An expertly crafted, heart-stopping tale of darkness and danger that I will not soon forget.”
—Whitley Strieber, New York Times bestselling author of The Grays