"With Extinction Horizon, Nicholas Sansbury Smith delivers unrelenting, unmerciful action to his readers, and he weaves it seamlessly with just enough scientific know-how that after each chapter you're left looking around and wondering not IF this is going to happen, but WHEN."
—D. J. Molles, author of The Remaining on Extinction Horizon
"Nicholas Sansbury Smith combines plausible science with fast-paced military action in an epic juggernaut that races along at supersonic speed. Fans of the genre are sure to love it!"—Russell Blake, bestselling author of The Day After Never on The Extinction Cycle
"A blistering, high octane thrill ride to the brink of humanity's extinction. Nicholas Sansbury Smith plunges the reader right into the middle of the action, alongside a cast of unforgettable characters, as they fight tooth and nail to survive one impossible mission after another-to stop an extinction level virus. The Extinction Cycle series is post-apocalyptic, military science fiction at its best. Highly addictive!"—Steven Konkoly, USA Today bestselling author of The Jakarta Pandemic on The Extinction Cycle
"Fast-paced military action meets cool, cutting-edge science. Extinction is no longer a Darwinian battle of the fittest. It's a race for survival."
—E. E. Giorgi, author of Chimeras on The Extinction Cycle
"Extinction Horizon is a roller coaster ride of fear and adrenaline that you will not want to put down. Nicholas Sansbury Smith once again separates himself from the masses with a brilliantly entertaining post-apocalyptic thriller."
—W. J. Lundy, author of Only the Dead Live Forever on The Extinction Cycle