Divergent is a series of young adult science fiction adventure novels by American novelist Veronica Roth set in a post-apocalyptic dystopian Chicago. The trilogy consists of Divergent, Insurgent, and Allegiant. From Wikipedia
Veronica Roth, author of the "Divergent" series, finds peace in the decision not to make final film as she feels movies followed a different track than her novels; book splitting trend, once all the rage, also criticised.