Summit Entertainment's adaptation of the bestselling Veronica Roth novel, Divergent, isn't due out until 2014, but the studio has already tapped screenwriter Brian Duffield (Jane Got a Gun) to pen the sequel.  The second book in the trilogy, titled Insurgent, follows the [spoiler?] continuing adventures of Beatrice "Tris" Prior as war looms on the horizon and people are forced to choose sides.  The recently-revealed title of third book is Allegiant and it's due out this October.

Divergent, the Neil Burger film, stars Shailene Woodley, Kate Winslet, Theo James, Ashley Judd, Tony Goldwyn, Ray Stevenson, Mekhi Phifer, Maggie Q, Jai Courtney, Miles Teller, Zoë Kravitz, Ansel Elgort, Ben Lloyd-Hughes, Ben Lamb, Christian Madsen and Amy Newbold.  Divergent opens on March 21, 2014.  Hit the jump for more.

Deadline reports that Duffield will take a crack at scripting the Divergent sequel, Insurgent. Duffield's debut feature script Jane Got a Gun is currently filming and seems to have sorted out its casting issues.

Here's the book description for Insurgent (via Amazon):

One choice can transform you—or it can destroy you. But every choice has consequences, and as unrest surges in the factions all around her, Tris Prior must continue trying to save those she loves—and herself—while grappling with haunting questions of grief and forgiveness, identity and loyalty, politics and love.

Tris's initiation day should have been marked by celebration and victory with her chosen faction; instead, the day ended with unspeakable horrors. War now looms as conflict between the factions and their ideologies grows. And in times of war, sides must be chosen, secrets will emerge, and choices will become even more irrevocable—and even more powerful. Transformed by her own decisions but also by haunting grief and guilt, radical new discoveries, and shifting relationships, Tris must fully embrace her Divergence, even if she does not know what she may lose by doing so.