Veronica Roth fans can start the countdown. HarperCollins Children’s Books told The Associated Press on Monday that the Divergent author is set to write a new two-book series. The books currently are untitled, with the first one expected in 2017 and the next in 2018. In a recent email to the AP, Roth wrote that “the idea started with a character. All the other elements — setting, world, even a substantial portion of the plot — came after.”