Every five minutes, a transplant candidate dies while waiting for a compatible heart, liver, or kidney. Imagine a technology that could provide those life-saving transplant organs for a high price, and imagine what a company would do to monopolize that technology.

On a remote island in Lake Superior, a team of geneticists has unlocked this holy grail of medicine. By reverse-engineering thousands of genomes, they dial back the evolutionary clock to re-create the progenitor of all mammals. The method? Illegal. The result? An AI-designed animal whose organs can be safely transplanted into any person.

There’s just one problem: these “ancestors” are not the docile herd animals the scientists envisioned. Instead, the project spawns something big, something evil … something very, very hungry.As creators become prey in an ultimate battle for survival, the research team must fight for their lives — even while government agents close in to shut the project down, and the deep-pocketed company backing this research reveals its own cold-blooded agenda.

PRAISE FOR ANCESTOR:

“This story sizzles with tension. Danger and drama mix with cutting-edge science to produce a top-notch, action-packed adventure. If you think Scott Sigler just writes horror, you’re dead wrong. This guy is one heck of a thriller writer.” Steve Berry, New York Times bestselling author of THE PARIS VENDETTA and THE CHARLEMAGNE PURSUIT

“Michael Crichton may be gone, but he has a worthy successor in Scott. This book takes thriller and science fiction conventions and slams them together to make something new and fascinating.” Simon R. Green, New York Times bestselling author of THE GOOD, THE BAD, AND THE UNCANNY and AGENTS OF LIGHT AND DARKNESS

“Sigler has a unique talent for keeping readers on the edge of their seats; I absolutely had to know what was going to happen next. Infected is full of mayhem, action, and gore -- and you won’t be able to put it down.” Dave Wellington, author of 13 BULLETS and the MONSTER ISLAND trilogy

"Fun, creepy, and impossible to stop reading, Ancestor is the rare thriller that’s based on cutting-edge science and is entirely possible. Long after you’re done with the book, you’ll still be looking over your shoulder. Just in case.” Phil Plait, PhD, author of DEATH FROM THE SKIES and UNDER ALIEN SKIESCREDITS