As the world changes faster than humanity can adapt to it, a government insider chases a serial killer who makes her question what it means to be a hero in this electrifying novel from the author of Containment.

With the world bordering on unprecedented technological change, Quinn Mitchell is an old-school, nine-to-five spy--an intelligence analyst for the CIA during the day, and a suburban wife and mother on evenings and weekends. After struggling with a personal tragedy, Quinn hopes to find redemption in her newest assignment: a series of bizarre, international assassinations where victims are found with numeric codes tattooed, burned, or carved into their flesh. As Quinn follows the killer's trail around the globe, always one body behind, she begins uncovering disturbing connections between the murders--and herself.

Finding the killer will hinge on Quinn's ability to grapple with the Epoch Index, a massive database that can reveal almost anything about anyone--past, present or future--and which leads her to a shocking twist that makes her question everything she thought she knew.

Christian Cantrell's inventive and exciting fiction explores unfamiliar worlds and alternative futures. A born prototyper, he has also written extensively on the evolution and future of technology, and he brings the full range of his scientific expertise to this captivating speculative thriller.