Veronica Roth 'Divergent' video reveal: Book 3 is ...

Lindsay Deutsch, USA TODAY | USATODAY

Show Caption Hide Caption Veronica Roth announces the title of Divergent book 3 Veronica Roth announces the title of Divergent book 3

Allegiant! That's the title of the conclusion to Veronica Roth's best-selling Divergent trilogy, Roth announces in this video.

The young adult series stars teenage Tris Prior and is set in dystopian Chicago. In Allegiant, which goes on sale Oct. 22 from HarperCollins, Tris faces impossible choices about where her loyalties lie and how she will live in the world beyond the walls of her dystopian Chicago.

The first book in the series, Divergent (2011), peaked at No. 31 on USA TODAY's Best-Selling books list and the second, Insurgent (2012), reached No. 10.

About the new title, "You gotta have the -ent (ending),'" Roth, 24, told USA TODAY's Brian Truitt when he interviewed her about Insurgent last year. Roth has jokingly been referring to Divergent book No. 3 on her blog with the title Detergent. The Divergent trilogy was purchased when Roth was still in college at Northwestern.

Fans will soon be able to show their allegiance at the box office. The Divergent movie started filming in Chicago in this month and stars Shailene Woodley ( The Descendants ) and Kate Winslet. It's directed by Neil Burger and will be released by Summit Entertainment (Twilight).

So, Divergent fans, what do you think?