Erin Neal has been living a secluded life in the Arizona desert since the death of his girlfriend and he isn’t happy when an oil company executive comes calling. A number of important Saudi wells have stopped producing and Erin is the world’s foremost expert in resolving just these kinds of complications. As far as he’s concerned, though, he’s left that world behind. Not his problem. Homeland Security sees things differently. Erin quickly finds himself stuck in the Saudi desert, studying a new bacteria with a voracious appetite for oil and an uncanny talent for destroying drilling equipment. But worst of all is its ability to spread. It soon becomes clear that if this contagion isn’t stopped, it will infiltrate the world’s petroleum reserves, cutting the industrial world off from the energy that provides the heat, food, and transportation necessary for survival. Erin realizes that there’s something eerily familiar about this bacteria. And that it couldn’t possibly have evolved on its own.

"Mills has a knack for creating plausible save-the-world scenarios…"
— Entertainment Weekly B+

" Darkness Falls keeps readers’ hearts pounding until the final pages and beyond. Mills writes with knowledge and authority, and while the novel is a work of fiction, it leaves you uneasy about the possibilities of its premise."
— Mystery Scene Magazine

"A fast-paced, heady thriller with a Doomsday scenario straight off today's front pages."
— Andrew Gross, New York Times best-selling author The Blue Zone & The Dark Tide

"Kyle Mills is a master of the page-turner…he will keep you reading well into the night."
— Vince Flynn, author of Memorial Day

"Masterful thriller writer Mills returns to his series hero, former FBI agent Mark Beamon (last seen in 2002's Sphere of Influence ), with a pulse-pounding apocalyptic scenario that is terrifying in its plausibility … While such plots are a dime a dozen, Mills's meticulous research, pacing and carefully developed characters make this variation particularly convincing."
— Publishers Weekly (starred review)

"Beamon, who's been featured in other Mills thrillers, is a seen-it-all character who hasn't seen anything like this…Mills has done it again: another up-all-night read (with nightmares to follow)."
— Booklist (starred review)