It began with a comet. When it came into view on a close pass by Earth, people took off work, gathering on sidewalks and in parking lots to watch it burn by. One year later, Earth spun into the debris field the comet left behind. Minnesota seemed to bear the brunt of the damage: meteors annihilated barns and silos, cratered pastures and hardwood forests, tore up county highways, and evaporated one small town in an instant. At first, it seems to be a disaster. Until the people of Minnesota notice deposits of unusual metal in the comet's debris. Not gold, silver, copper, tin, iron or any of the noble metals, it's a previously unknown ninth metal: omnimetal. With high-density charging capabilities and conductive properties that can change the world as an energy source, the deposit might be the best thing that ever happened to the northern section of the state, where the economy has been dying for a long time. Or it might be the worst. It is then that the "gold rush" begins. Farmers sell their metal-rich land for millions. Comet-worshipping cults set up compounds and repeat the phrase "Metal is" as their mantra. Roughnecks flood the town, hungry for work and trouble. Prostitutes flourish. Businesses rise. Families are divided. Saudis bid against the Chinese on land grabs. Bodies lie in shallow graves. As witnessed when oil was discovered in the Bakken Formation of North Dakota, the heartland in our story goes from the middle of nowhere to the center of everything. And one family—the Frontiers—hopes to control it all.

The night the sky fell, Jack and Nora Abernathy’s daughter vanished in the woods. And Mia’s disappearance broke her parents’ already fragile marriage. Unable to solve her own daughter’s case, Nora lost herself in her work as a homicide detective. Jack became a shell of a man; his promising career as a biologist crumbling alongside the meteor strikes that altered weather patterns and caused a massive drought. It isn’t until five years later that the rains finally return to nourish Seattle. In this period of sudden growth, Jack uncovers evidence of a new parasitic fungus, while Nora investigates several brutal, ritualistic murders. Soon they will be drawn together by a horrifying connection between their discoveries—partnering to fight a deadly contagion as well as the government forces that know the truth about the fate of their daughter. Award-winning author Benjamin Percy delivers both a gripping science fiction thriller and a dazzling examination of a planet—and a marriage—that have broken.

The third book in Percy’s innovative and acclaimed Comet Cycle, The Sky Vault, follows an investigation of a mysterious weather phenomena in Fairbanks, Alaska, and a government secret buried since WWII. The comet, Cain, came from beyond our solar system, its debris containing elements unknown. Now, in the isolated region of Fairbanks, Alaska, the skies shift and stretch as an interstellar dust cloud seeds the atmosphere. When a plane shudders its way through pulpy, swirling, bruise-shaped clouds, lit with sudden cracks of lightning, the sky opens and the aircraft vanishes…but only for a minute. When the flight lands, everyone on board and in the community will be changed forever. Chuck Bridges, a local DJ and conspiracy theorist, was on board and later reported dead to his family, but not before proclaiming that something inside the clouds was speaking to him. Now his son, Theo, must chase down answers to the mystery his father unlocked. He’ll find himself at odds with Sophie Chen, an agent with a shadowy employer desperate to secure the black box from the airplane, as well as Rolf Wagner, a widowed sheriff investigating a series of increasingly strange and unsettling reports. And then there is Joanna Straub, a contractor reconstructing a top-secret government lab active during WWII and shuttered deep within the nearby White Mountains. The answer to the comet’s origin is about to be unveiled, and its impact on Earth is more treacherous and sublime than humanity could imagine.