When their worlds collide, a Montana girl named Zoe and a bounty hunter called X grapple with the ultimate sacrifice in order to be together in this cinematic, star-crossed romance series debut.

When their worlds collide, X and Zoe are pushed to the edge of everything in this tour de force from Entertainment Weekly veteran Jeff Giles.

For the perfect love, what would you be willing to lose?

It's been a shattering year for seventeen-year-old Zoe, who's still reeling from her father's shocking death in a caving accident and her neighbors' mysterious disappearance from their own home. Then on a terrifying subzero, blizzardy night in Montana, she and her brother are brutally attacked in the woods--only to be rescued by a mysterious bounty hunter they call X.

X is no ordinary bounty hunter. He is from a hell called the Lowlands, sent to claim the soul of Zoe's evil attacker and others like him. X is forbidden from revealing himself to anyone other than his prey, but he casts aside the Lowlands' rules for Zoe. As they learn more about their colliding worlds, they begin to question the past, their fate, and their future. But escaping the Lowlands and the ties that bind X might mean the ultimate sacrifice for them both.

Gripping and full of heart, this epic start to a new series will bring readers right to the edge of everything.

Utterly original. Beautifully written. At turns poignant and funny, the story of Zoe and her fight to save her family and the strange young man known only as 'X' will stay with you long after you finish this extraordinary book. --Peter Jackson, Oscar-winning director of The Lord of the Rings and The Hobbit trilogies

Utterly fantastic. Dark, funny, exciting, a unique clashing of worlds. Every human alive should read this book. --James Dashner, #1 New York Times bestselling author of The Maze Runner

A fresh and addictive read that grabbed me from the first page and still hasn't let me go. Jeff Giles led me into the darkness--ultimately reminding me why we should never stop searching for the light. --Kami Garcia, #1 New York Times bestselling co-author of Beautiful Creatures and author of The Lovely Reckless

Sharp, dark, thoughtful and romantic, readers will thrill to the start of this exciting new series. --Cassandra Clare, #1 New York Times bestselling author of The Mortal Instruments series

A dark and suspenseful supernatural thriller that kept me up all night. --Melissa de la Cruz, #1 New York Times bestselling author of The Isle of the Lost

Every human alive should read this book. --James Dashner, #1 New York Times bestselling author of The Maze Runner