Scott Westerfeld's new novel Afterworlds doesn't come out until September — but here's an exclusive look at an intense book trailer to tide you over. In which we meet two girls: Darcy, an aspiring author whose stories get a little too vivid. And Lizzie, a girl whose life is uncannily similar to Darcy's strange inventions.

Here's the official synopsis for Afterworlds:

Darcy Patel has put college on hold to publish her teen novel, Afterworlds. With a contract in hand, she arrives in New York City with no apartment, no friends, and all the wrong clothes. But lucky for Darcy, she's taken under the wings of other seasoned and fledgling writers who help her navigate the city and the world of writing and publishing. Over the course of a year, Darcy finishes her book, faces critique, and falls in love.

Woven into Darcy's personal story is her novel, Afterworlds, a suspenseful thriller about a teen who slips into the "Afterworld" to survive a terrorist attack. The Afterworld is a place between the living and the dead, and where many unsolved—and terrifying—stories need to be reconciled. Like Darcy, Lizzie too falls in love…until a new threat resurfaces, and her special gifts may not be enough to protect those she cares about most.