Sierra Pictures will finance and produce the film adaptation of Obsidian, about a 17-year-old girl who discovers that her neighbor is anything but the normal guy next door, The Hollywood Reporter said.

Jennifer Armentrout's YA novel, published by Entangled Publishing, is the first in the five-title Lux series.

The story follows Katy Swartz as she moves to rural West Virginia just before her senior year, resigned to a life of boredom. Things look up when she meets Daemon Black, her neighbor, but she quickly finds herself infuriated by his arrogance. However, Daemon and his sister soon turn out to have otherworldly powers with a galaxy of enemies pursuing them, with Katy caught in their crosshairs.

Sierra's Nick Meyer and Marc Schaberg will executive produce the movie, with Sierra/Affinity handling international sales. Sierra/Affinity senior vp of production and acquisitions Kelly McCormick and senior vp of sales Kristen Figeroid were instrumental in bringing in the property. McCormick will oversee production.

Armentrout's new e-book Wait for You -- published under the pen name J. Lynn -- debuted at No. 25 on the New York Times E-Book Fiction Best Sellers list before shooting up to No. 1 in its third week. She also topped the Amazon.com self-published list, the Barnes and Noble self-published list and the iTunes self-published list.

Armentrout and Entangled Publishing are represented by the Gersh Agency; Marsal Lyon Agency is the publishing agent.