In the wake of the solar eclipse, a portal between our world and a paranormal realm opens—and a scientist's life will never be the same, in this thrilling serialized adventure from the New York Times bestselling author of The Hollows.

Dr. Renee Caisson knows there are worse things than an attractive man in uniform drafting her into a secret government project—especially when Major Jackson makes it clear that he isn't bothered by her questionable past. But when her labs come back with decidedly odd results, the Major is forced to come clean over who the government is actually studying. Renee is shocked to learn her subjects are demonic-looking beings who call themselves "Neighbors"—refugees from a dying world, who arrived during the nation-wide solar eclipse.

The Neighbors' technology is unlike anything Renee's ever encountered. At first, she dismisses an injury that inexplicably heals as "just one of those things". And surely August, the most gregarious Neighbor, begins to speak English overnight because of the team linguist's skills?

Not until August begins evolving in real time to withstand Earth's brighter, dryer atmosphere does she admit that the Neighbors' "tech" feels less like science and more like magic—the same magic that brought them here in the first place, and the same they're trying to rekindle with a mysterious labyrinth in order to return home and save their world.

At least, that's what August claims they came for.