Allegiant is a science fiction novel for young adults, written by the American author Veronica Roth and published by HarperCollins in October 2013. It completes the Divergent trilogy that Roth started with her debut novel Divergent in 2011. The book is written from the perspective of both Beatrice (Tris) and Tobias (Four). Following the revelations of the previous novel, they journey past the city's boundaries to discover what lies beyond.
The story of a junior diplomat and his first posting to a planet of Texans whose dinosaur-sized cattle have to be herded with tanks, and whose system of government derives its character from Mencken's 1924 essay "The Malevolent Jobholder," -- a system under which the killing of a practicing politician is considered justifiable homicide!